65674979 has 4 divisors (see below), whose sum is σ = 66751680. Its totient is φ = 64598280.

The previous prime is 65674967. The next prime is 65674997. The reversal of 65674979 is 97947656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65674979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65674979.

It is not an unprimeable number, because it can be changed into a prime (65674949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538259 + ... + 538380.

It is an arithmetic number, because the mean of its divisors is an integer number (16687920).

Almost surely, 2^65674979 is an apocalyptic number.

65674979 is a deficient number, since it is larger than the sum of its proper divisors (1076701).

65674979 is a wasteful number, since it uses less digits than its factorization.

65674979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076700.

The product of its digits is 2857680, while the sum is 53.

The square root of 65674979 is about 8104.0100567559. The cubic root of 65674979 is about 403.4595324118.

The spelling of 65674979 in words is "sixty-five million, six hundred seventy-four thousand, nine hundred seventy-nine".