66903679 has 2 divisors, whose sum is σ = 66903680. Its totient is φ = 66903678.

The previous prime is 66903647. The next prime is 66903689. The reversal of 66903679 is 97630966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66903679 - 2⁵ = 66903647 is a prime.

It is a super-2 number, since 2×66903679² = 8952204527470082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66903689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33451839 + 33451840.

It is an arithmetic number, because the mean of its divisors is an integer number (33451840).

Almost surely, 2^66903679 is an apocalyptic number.

66903679 is a deficient number, since it is larger than the sum of its proper divisors (1).

66903679 is an equidigital number, since it uses as much as digits as its factorization.

66903679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 66903679 is about 8179.4669141699. The cubic root of 66903679 is about 405.9600836779.

The spelling of 66903679 in words is "sixty-six million, nine hundred three thousand, six hundred seventy-nine".