2669997779550 has 480 divisors, whose sum is σ = 7919240234400. Its totient is φ = 665699005440.

The previous prime is 2669997779549. The next prime is 2669997779551. The reversal of 2669997779550 is 559777999662.

2669997779550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2669997779549) and next prime (2669997779551).

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 2669997779550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2669997779551) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 995152509 + ... + 995155191.

It is an arithmetic number, because the mean of its divisors is an integer number (16498417155).

Almost surely, 2^{2669997779550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2669997779550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3959620117200).

2669997779550 is an abundant number, since it is smaller than the sum of its proper divisors (5249242454850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2669997779550 is a wasteful number, since it uses less digits than its factorization.

2669997779550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 4050761400, while the sum is 81.

The spelling of 2669997779550 in words is "two trillion, six hundred sixty-nine billion, nine hundred ninety-seven million, seven hundred seventy-nine thousand, five hundred fifty".