66932969 has 2 divisors, whose sum is σ = 66932970. Its totient is φ = 66932968.

The previous prime is 66932947. The next prime is 66932981. The reversal of 66932969 is 96923966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41126569 + 25806400 = 6413^2 + 5080^2 .

It is a cyclic number.

It is not a de Polignac number, because 66932969 - 2²⁴ = 50155753 is a prime.

It is a super-2 number, since 2×66932969² = 8960044678309922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66932909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33466484 + 33466485.

It is an arithmetic number, because the mean of its divisors is an integer number (33466485).

Almost surely, 2^66932969 is an apocalyptic number.

It is an amenable number.

66932969 is a deficient number, since it is larger than the sum of its proper divisors (1).

66932969 is an equidigital number, since it uses as much as digits as its factorization.

66932969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 50.

The square root of 66932969 is about 8181.2571772314. The cubic root of 66932969 is about 406.0193172719.

The spelling of 66932969 in words is "sixty-six million, nine hundred thirty-two thousand, nine hundred sixty-nine".