2620543266 has 80 divisors (see below), whose sum is σ = 6427365120. Its totient is φ = 791428320.

The previous prime is 2620543259. The next prime is 2620543271. The reversal of 2620543266 is 6623450262.

2620543266 is a `hidden beast` number, since 2 + 620 + 5 + 4 + 3 + 26 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2620543266.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 562575 + ... + 567213.

It is an arithmetic number, because the mean of its divisors is an integer number (80342064).

Almost surely, 2^2620543266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2620543266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3213682560).

2620543266 is an abundant number, since it is smaller than the sum of its proper divisors (3806821854).

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

2620543266 is a wasteful number, since it uses less digits than its factorization.

2620543266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4981 (or 4972 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 2620543266 is about 51191.2420829970. The cubic root of 2620543266 is about 1378.6809608024.

The spelling of 2620543266 in words is "two billion, six hundred twenty million, five hundred forty-three thousand, two hundred sixty-six".