166431433456 has 40 divisors (see below), whose sum is σ = 325725580800. Its totient is φ = 82376146944.

The previous prime is 166431433453. The next prime is 166431433471. The reversal of 166431433456 is 654334134661.

It is a super-2 number, since 2×166431433456² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166431433453) 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, 821160 + ... + 1003576.

It is an arithmetic number, because the mean of its divisors is an integer number (8143139520).

Almost surely, 2^166431433456 is an apocalyptic number.

166431433456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166431433456 is a deficient number, since it is larger than the sum of its proper divisors (159294147344).

166431433456 is a wasteful number, since it uses less digits than its factorization.

166431433456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183001 (or 182995 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 46.

The spelling of 166431433456 in words is "one hundred sixty-six billion, four hundred thirty-one million, four hundred thirty-three thousand, four hundred fifty-six".