166531614261556 has 12 divisors (see below), whose sum is σ = 291430432435968. Its totient is φ = 83265776422712.

The previous prime is 166531614261547. The next prime is 166531614261559. The reversal of 166531614261556 is 655162416135661.

166531614261556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166531614261556² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166531614261556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166531614261559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8150595 + ... + 19987381.

It is an arithmetic number, because the mean of its divisors is an integer number (24285869369664).

Almost surely, 2^{166531614261556} is an apocalyptic number.

It is an amenable number.

166531614261556 is a deficient number, since it is larger than the sum of its proper divisors (124898818174412).

166531614261556 is a wasteful number, since it uses less digits than its factorization.

166531614261556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15354038 (or 15354036 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 58.

The spelling of 166531614261556 in words is "one hundred sixty-six trillion, five hundred thirty-one billion, six hundred fourteen million, two hundred sixty-one thousand, five hundred fifty-six".