166451006601 has 96 divisors (see below), whose sum is σ = 277393019904. Its totient is φ = 95196816000.

The previous prime is 166451006591. The next prime is 166451006633. The reversal of 166451006601 is 106600154661.

It is a happy number.

166451006601 is a `hidden beast` number, since 1 + 6 + 6 + 45 + 1 + 0 + 0 + 6 + 601 = 666.

It is not a de Polignac number, because 166451006601 - 2¹⁵ = 166450973833 is a prime.

It is a super-2 number, since 2×166451006601² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166491006601) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 53988406 + ... + 53991488.

It is an arithmetic number, because the mean of its divisors is an integer number (2889510624).

Almost surely, 2^166451006601 is an apocalyptic number.

166451006601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166451006601 is a deficient number, since it is larger than the sum of its proper divisors (110942013303).

166451006601 is a wasteful number, since it uses less digits than its factorization.

166451006601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435 (or 3432 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 166451006601 in words is "one hundred sixty-six billion, four hundred fifty-one million, six thousand, six hundred one".