66572307 has 8 divisors (see below), whose sum is σ = 98625680. Its totient is φ = 44381520.

The previous prime is 66572279. The next prime is 66572321. The reversal of 66572307 is 70327566.

It is a happy number.

It is not a de Polignac number, because 66572307 - 2¹² = 66568211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66572347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1232794 + ... + 1232847.

It is an arithmetic number, because the mean of its divisors is an integer number (12328210).

Almost surely, 2^66572307 is an apocalyptic number.

66572307 is a deficient number, since it is larger than the sum of its proper divisors (32053373).

66572307 is a wasteful number, since it uses less digits than its factorization.

66572307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465650 (or 2465644 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 66572307 is about 8159.1854372848. The cubic root of 66572307 is about 405.2887378589.

The spelling of 66572307 in words is "sixty-six million, five hundred seventy-two thousand, three hundred seven".