166264605 has 48 divisors (see below), whose sum is σ = 314810496. Its totient is φ = 80680320.

The previous prime is 166264601. The next prime is 166264613. The reversal of 166264605 is 506462661.

It is a happy number.

166264605 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 646 + 0 + 5 = 666.

It is not a de Polignac number, because 166264605 - 2² = 166264601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166264605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166264601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39534 + ... + 43536.

It is an arithmetic number, because the mean of its divisors is an integer number (6558552).

Almost surely, 2^166264605 is an apocalyptic number.

166264605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166264605 is a deficient number, since it is larger than the sum of its proper divisors (148545891).

166264605 is a wasteful number, since it uses less digits than its factorization.

166264605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098 (or 4095 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 166264605 is about 12894.3633033973. The cubic root of 166264605 is about 549.8783257015.

The spelling of 166264605 in words is "one hundred sixty-six million, two hundred sixty-four thousand, six hundred five".