65979225 has 96 divisors (see below), whose sum is σ = 133602560. Its totient is φ = 31726080.

The previous prime is 65979217. The next prime is 65979239. The reversal of 65979225 is 52297956.

It is not a de Polignac number, because 65979225 - 2³ = 65979217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 640524 + ... + 640626.

Almost surely, 2^65979225 is an apocalyptic number.

65979225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65979225 is an abundant number, since it is smaller than the sum of its proper divisors (67623335).

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

65979225 is a wasteful number, since it uses less digits than its factorization.

65979225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 197 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 65979225 is about 8122.7596911395. The cubic root of 65979225 is about 404.0815952076.

The spelling of 65979225 in words is "sixty-five million, nine hundred seventy-nine thousand, two hundred twenty-five".