65220879 has 8 divisors (see below), whose sum is σ = 86998912. Its totient is φ = 43461720.

The previous prime is 65220877. The next prime is 65220889. The reversal of 65220879 is 97802256.

It is a happy number.

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

It is not a de Polignac number, because 65220879 - 2¹ = 65220877 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 (65220877) 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, 9294 + ... + 14724.

It is an arithmetic number, because the mean of its divisors is an integer number (10874864).

Almost surely, 2^65220879 is an apocalyptic number.

65220879 is a deficient number, since it is larger than the sum of its proper divisors (21778033).

65220879 is a wasteful number, since it uses less digits than its factorization.

65220879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 65220879 is about 8075.9444648908. The cubic root of 65220879 is about 402.5274937175.

The spelling of 65220879 in words is "sixty-five million, two hundred twenty thousand, eight hundred seventy-nine".