166026636 has 36 divisors (see below), whose sum is σ = 441768600. Its totient is φ = 52429248.

The previous prime is 166026631. The next prime is 166026647. The reversal of 166026636 is 636620661.

166026636 is a `hidden beast` number, since 16 + 6 + 0 + 2 + 6 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×166026636² = 55129687722952992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 166026636.

It is not an unprimeable number, because it can be changed into a prime (166026631) 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, 120681 + ... + 122048.

It is an arithmetic number, because the mean of its divisors is an integer number (12271350).

Almost surely, 2^166026636 is an apocalyptic number.

It is an amenable number.

166026636 is an abundant number, since it is smaller than the sum of its proper divisors (275741964).

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

166026636 is a wasteful number, since it uses less digits than its factorization.

166026636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242758 (or 242753 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 166026636 is about 12885.1323625332. The cubic root of 166026636 is about 549.6158595882.

The spelling of 166026636 in words is "one hundred sixty-six million, twenty-six thousand, six hundred thirty-six".