615621662166 has 64 divisors (see below), whose sum is σ = 1483384158720. Its totient is φ = 166388152320.

The previous prime is 615621662141. The next prime is 615621662189. The reversal of 615621662166 is 661266126516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29515 + ... + 1110006.

It is an arithmetic number, because the mean of its divisors is an integer number (23177877480).

Almost surely, 2^615621662166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 615621662166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741692079360).

615621662166 is an abundant number, since it is smaller than the sum of its proper divisors (867762496554).

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

615621662166 is a wasteful number, since it uses less digits than its factorization.

615621662166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140229.

The product of its digits is 933120, while the sum is 48.

The spelling of 615621662166 in words is "six hundred fifteen billion, six hundred twenty-one million, six hundred sixty-two thousand, one hundred sixty-six".