66008475 has 36 divisors (see below), whose sum is σ = 127328656. Its totient is φ = 32495040.

The previous prime is 66008471. The next prime is 66008491. The reversal of 66008475 is 57480066.

It is a happy number.

66008475 is a `hidden beast` number, since 6 + 600 + 8 + 47 + 5 = 666.

It is not a de Polignac number, because 66008475 - 2² = 66008471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66008471) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8359 + ... + 14208.

Almost surely, 2^66008475 is an apocalyptic number.

66008475 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66008475 is a deficient number, since it is larger than the sum of its proper divisors (61320181).

66008475 is a wasteful number, since it uses less digits than its factorization.

66008475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22596 (or 22588 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 66008475 is about 8124.5599880855. The cubic root of 66008475 is about 404.1412990538.

The spelling of 66008475 in words is "sixty-six million, eight thousand, four hundred seventy-five".