66942907 has 2 divisors, whose sum is σ = 66942908. Its totient is φ = 66942906.

The previous prime is 66942881. The next prime is 66942929. The reversal of 66942907 is 70924966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66942907 - 2⁷ = 66942779 is a prime.

It is a super-2 number, since 2×66942907² = 8962705595221298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66942937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33471453 + 33471454.

It is an arithmetic number, because the mean of its divisors is an integer number (33471454).

Almost surely, 2^66942907 is an apocalyptic number.

66942907 is a deficient number, since it is larger than the sum of its proper divisors (1).

66942907 is an equidigital number, since it uses as much as digits as its factorization.

66942907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 66942907 is about 8181.8645185557. The cubic root of 66942907 is about 406.0394111078.

The spelling of 66942907 in words is "sixty-six million, nine hundred forty-two thousand, nine hundred seven".