66917319 has 16 divisors (see below), whose sum is σ = 102254592. Its totient is φ = 38131488.

The previous prime is 66917303. The next prime is 66917341. The reversal of 66917319 is 91371966.

It is not a de Polignac number, because 66917319 - 2⁴ = 66917303 is a prime.

It is a super-2 number, since 2×66917319² = 8955855164295522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66917359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3562 + ... + 12104.

It is an arithmetic number, because the mean of its divisors is an integer number (6390912).

Almost surely, 2^66917319 is an apocalyptic number.

66917319 is a deficient number, since it is larger than the sum of its proper divisors (35337273).

66917319 is a wasteful number, since it uses less digits than its factorization.

66917319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8926.

The product of its digits is 61236, while the sum is 42.

The square root of 66917319 is about 8180.3006668459. The cubic root of 66917319 is about 405.9876701991.

The spelling of 66917319 in words is "sixty-six million, nine hundred seventeen thousand, three hundred nineteen".