65622978 has 24 divisors (see below), whose sum is σ = 146027388. Its totient is φ = 21282912.

The previous prime is 65622961. The next prime is 65622983. The reversal of 65622978 is 87922656.

It can be written as a sum of positive squares in 2 ways, for example, as 57653649 + 7969329 = 7593^2 + 2823^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48601 + ... + 49932.

Almost surely, 2^65622978 is an apocalyptic number.

65622978 is an abundant number, since it is smaller than the sum of its proper divisors (80404410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65622978 is a wasteful number, since it uses less digits than its factorization.

65622978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98578 (or 98575 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 65622978 is about 8100.8010714990. The cubic root of 65622978 is about 403.3530187935.

The spelling of 65622978 in words is "sixty-five million, six hundred twenty-two thousand, nine hundred seventy-eight".