2666316450402 has 160 divisors (see below), whose sum is σ = 6885137160000. Its totient is φ = 762722956800.

The previous prime is 2666316450283. The next prime is 2666316450407. The reversal of 2666316450402 is 2040546136662.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2666316450407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9373974 + ... + 9654222.

It is an arithmetic number, because the mean of its divisors is an integer number (43032107250).

Almost surely, 2^{2666316450402} is an apocalyptic number.

2666316450402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2666316450402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3442568580000).

2666316450402 is an abundant number, since it is smaller than the sum of its proper divisors (4218820709598).

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

2666316450402 is a wasteful number, since it uses less digits than its factorization.

2666316450402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280574 (or 280565 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 2666316450402 in words is "two trillion, six hundred sixty-six billion, three hundred sixteen million, four hundred fifty thousand, four hundred two".