166451567044 has 36 divisors (see below), whose sum is σ = 338970354240. Its totient is φ = 71310592080.

The previous prime is 166451567027. The next prime is 166451567047. The reversal of 166451567044 is 440765154661.

It is a super-2 number, since 2×166451567044² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (166451567047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394897 + ... + 699175.

Almost surely, 2^166451567044 is an apocalyptic number.

166451567044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166451567044 is an abundant number, since it is smaller than the sum of its proper divisors (172518787196).

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

166451567044 is a wasteful number, since it uses less digits than its factorization.

166451567044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307088 (or 307079 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 166451567044 in words is "one hundred sixty-six billion, four hundred fifty-one million, five hundred sixty-seven thousand, forty-four".