65994979 has 2 divisors, whose sum is σ = 65994980. Its totient is φ = 65994978.

The previous prime is 65994959. The next prime is 65995009. The reversal of 65994979 is 97949956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65994979 - 2²³ = 57606371 is a prime.

It is not a weakly prime, because it can be changed into another prime (65994919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32997489 + 32997490.

It is an arithmetic number, because the mean of its divisors is an integer number (32997490).

Almost surely, 2^65994979 is an apocalyptic number.

65994979 is a deficient number, since it is larger than the sum of its proper divisors (1).

65994979 is an equidigital number, since it uses as much as digits as its factorization.

65994979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 58.

The square root of 65994979 is about 8123.7293775704. The cubic root of 65994979 is about 404.1137537891.

The spelling of 65994979 in words is "sixty-five million, nine hundred ninety-four thousand, nine hundred seventy-nine".