66375307 has 2 divisors, whose sum is σ = 66375308. Its totient is φ = 66375306.

The previous prime is 66375301. The next prime is 66375311. The reversal of 66375307 is 70357366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66375307 is a prime.

It is not a weakly prime, because it can be changed into another prime (66375301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33187653 + 33187654.

It is an arithmetic number, because the mean of its divisors is an integer number (33187654).

Almost surely, 2^66375307 is an apocalyptic number.

66375307 is a deficient number, since it is larger than the sum of its proper divisors (1).

66375307 is an equidigital number, since it uses as much as digits as its factorization.

66375307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 37.

The square root of 66375307 is about 8147.1042094722. The cubic root of 66375307 is about 404.8885676259. Note that the first 3 decimals are identical.

The spelling of 66375307 in words is "sixty-six million, three hundred seventy-five thousand, three hundred seven".