166535016514631 has 8 divisors (see below), whose sum is σ = 166620281286144. Its totient is φ = 166449763168920.

The previous prime is 166535016514507. The next prime is 166535016514639. The reversal of 166535016514631 is 136415610535661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166535016514631 - 2³⁰ = 166533942772807 is a prime.

It is a super-2 number, since 2×166535016514631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166535016514639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26378246 + ... + 32076188.

It is an arithmetic number, because the mean of its divisors is an integer number (20827535160768).

Almost surely, 2^{166535016514631} is an apocalyptic number.

166535016514631 is a deficient number, since it is larger than the sum of its proper divisors (85264771513).

166535016514631 is a wasteful number, since it uses less digits than its factorization.

166535016514631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5712901.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 166535016514631 in words is "one hundred sixty-six trillion, five hundred thirty-five billion, sixteen million, five hundred fourteen thousand, six hundred thirty-one".