66974685 has 16 divisors (see below), whose sum is σ = 107625024. Its totient is φ = 35564672.

The previous prime is 66974657. The next prime is 66974707. The reversal of 66974685 is 58647966.

It is a cyclic number.

It is not a de Polignac number, because 66974685 - 2⁸ = 66974429 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6087 + ... + 13076.

It is an arithmetic number, because the mean of its divisors is an integer number (6726564).

Almost surely, 2^66974685 is an apocalyptic number.

It is an amenable number.

66974685 is a deficient number, since it is larger than the sum of its proper divisors (40650339).

66974685 is a wasteful number, since it uses less digits than its factorization.

66974685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19404.

The product of its digits is 2177280, while the sum is 51.

The square root of 66974685 is about 8183.8062660354. The cubic root of 66974685 is about 406.1036503220.

The spelling of 66974685 in words is "sixty-six million, nine hundred seventy-four thousand, six hundred eighty-five".