166387545 has 24 divisors (see below), whose sum is σ = 288709512. Its totient is φ = 88646400.

The previous prime is 166387537. The next prime is 166387561. The reversal of 166387545 is 545783661.

166387545 is a `hidden beast` number, since 1 + 6 + 638 + 7 + 5 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 40297104 + 126090441 = 6348^2 + 11229^2 .

It is not a de Polignac number, because 166387545 - 2³ = 166387537 is a prime.

It is a super-2 number, since 2×166387545² = 55369630262254050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 166387545.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71805 + ... + 74085.

It is an arithmetic number, because the mean of its divisors is an integer number (12029563).

Almost surely, 2^166387545 is an apocalyptic number.

166387545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166387545 is a deficient number, since it is larger than the sum of its proper divisors (122321967).

166387545 is a wasteful number, since it uses less digits than its factorization.

166387545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913 (or 3910 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 166387545 is about 12899.1296218001. The cubic root of 166387545 is about 550.0138233440.

The spelling of 166387545 in words is "one hundred sixty-six million, three hundred eighty-seven thousand, five hundred forty-five".