83664975 has 12 divisors (see below), whose sum is σ = 138326216. Its totient is φ = 44621280.

The previous prime is 83664967. The next prime is 83664979. The reversal of 83664975 is 57946638.

It is not a de Polignac number, because 83664975 - 2³ = 83664967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83664979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 557692 + ... + 557841.

Almost surely, 2^83664975 is an apocalyptic number.

83664975 is a deficient number, since it is larger than the sum of its proper divisors (54661241).

83664975 is a wasteful number, since it uses less digits than its factorization.

83664975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115546 (or 1115541 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 83664975 is about 9146.8560172335. The cubic root of 83664975 is about 437.3688967714.

The spelling of 83664975 in words is "eighty-three million, six hundred sixty-four thousand, nine hundred seventy-five".