166011660015015 has 32 divisors (see below), whose sum is σ = 272099387964096. Its totient is φ = 86379343395840.

The previous prime is 166011660015011. The next prime is 166011660015049. The reversal of 166011660015015 is 510510066110661.

166011660015015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166011660015015 - 2² = 166011660015011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166011660015011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78745437 + ... + 80826153.

It is an arithmetic number, because the mean of its divisors is an integer number (8503105873878).

Almost surely, 2^{166011660015015} is an apocalyptic number.

166011660015015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166011660015015 is a deficient number, since it is larger than the sum of its proper divisors (106087727949081).

166011660015015 is a wasteful number, since it uses less digits than its factorization.

166011660015015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210499.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 166011660015015 in words is "one hundred sixty-six trillion, eleven billion, six hundred sixty million, fifteen thousand, fifteen".