515666401562166 has 16 divisors (see below), whose sum is σ = 1031354630378688. Its totient is φ = 171885162645000.

The previous prime is 515666401562107. The next prime is 515666401562189. The reversal of 515666401562166 is 661265104666515.

It is a super-2 number, since 2×515666401562166² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909161800 + ... + 909728811.

It is an arithmetic number, because the mean of its divisors is an integer number (64459664398668).

Almost surely, 2^{515666401562166} is an apocalyptic number.

515666401562166 is an abundant number, since it is smaller than the sum of its proper divisors (515688228816522).

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

515666401562166 is a wasteful number, since it uses less digits than its factorization.

515666401562166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818937867.

The product of its (nonzero) digits is 46656000, while the sum is 60.

The spelling of 515666401562166 in words is "five hundred fifteen trillion, six hundred sixty-six billion, four hundred one million, five hundred sixty-two thousand, one hundred sixty-six".