166011511111530 has 64 divisors (see below), whose sum is σ = 455347300439808. Its totient is φ = 37945368138240.

The previous prime is 166011511111519. The next prime is 166011511111549. The reversal of 166011511111530 is 35111115110661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 166011511111491 and 166011511111500.

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, 76817560 + ... + 78949100.

It is an arithmetic number, because the mean of its divisors is an integer number (7114801569372).

Almost surely, 2^{166011511111530} is an apocalyptic number.

166011511111530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166011511111530 is an abundant number, since it is smaller than the sum of its proper divisors (289335789328278).

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

166011511111530 is a wasteful number, since it uses less digits than its factorization.

166011511111530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502431.

The product of its (nonzero) digits is 2700, while the sum is 33.

The spelling of 166011511111530 in words is "one hundred sixty-six trillion, eleven billion, five hundred eleven million, one hundred eleven thousand, five hundred thirty".