65507979 has 8 divisors (see below), whose sum is σ = 91141632. Its totient is φ = 41773160.

The previous prime is 65507957. The next prime is 65507983. The reversal of 65507979 is 97970556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65507979 - 2¹² = 65503883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65507909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474627 + ... + 474764.

It is an arithmetic number, because the mean of its divisors is an integer number (11392704).

Almost surely, 2^65507979 is an apocalyptic number.

65507979 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

65507979 is a deficient number, since it is larger than the sum of its proper divisors (25633653).

65507979 is a wasteful number, since it uses less digits than its factorization.

65507979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949417.

The product of its (nonzero) digits is 595350, while the sum is 48.

The square root of 65507979 is about 8093.6999573743. The cubic root of 65507979 is about 403.1172664342.

The spelling of 65507979 in words is "sixty-five million, five hundred seven thousand, nine hundred seventy-nine".