66555675 has 60 divisors (see below), whose sum is σ = 128734320. Its totient is φ = 33929280.

The previous prime is 66555661. The next prime is 66555707. The reversal of 66555675 is 57655566.

It is not a de Polignac number, because 66555675 - 2⁴ = 66555659 is a prime.

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 66555675.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 45861 + ... + 47289.

It is an arithmetic number, because the mean of its divisors is an integer number (2145572).

Almost surely, 2^66555675 is an apocalyptic number.

66555675 is a deficient number, since it is larger than the sum of its proper divisors (62178645).

66555675 is a wasteful number, since it uses less digits than its factorization.

66555675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1460 counting only the distinct ones).

The product of its digits is 945000, while the sum is 45.

The square root of 66555675 is about 8158.1661542285. The cubic root of 66555675 is about 405.2549834645.

The spelling of 66555675 in words is "sixty-six million, five hundred fifty-five thousand, six hundred seventy-five".