66932939 has 2 divisors, whose sum is σ = 66932940. Its totient is φ = 66932938.

The previous prime is 66932923. The next prime is 66932941. The reversal of 66932939 is 93923966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66932939 - 2⁴ = 66932923 is a prime.

Together with 66932941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66932893 and 66932902.

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, 33466469 + 33466470.

It is an arithmetic number, because the mean of its divisors is an integer number (33466470).

Almost surely, 2^66932939 is an apocalyptic number.

66932939 is a deficient number, since it is larger than the sum of its proper divisors (1).

66932939 is an equidigital number, since it uses as much as digits as its factorization.

66932939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472392, while the sum is 47.

The square root of 66932939 is about 8181.2553437721. The cubic root of 66932939 is about 406.0192566113.

The spelling of 66932939 in words is "sixty-six million, nine hundred thirty-two thousand, nine hundred thirty-nine".