65659980 has 24 divisors (see below), whose sum is σ = 183848112. Its totient is φ = 17509312.

The previous prime is 65659969. The next prime is 65660003. The reversal of 65659980 is 8995656.

It is a super-2 number, since 2×65659980² = 8622465947200800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547107 + ... + 547226.

It is an arithmetic number, because the mean of its divisors is an integer number (7660338).

Almost surely, 2^65659980 is an apocalyptic number.

65659980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65659980 is an abundant number, since it is smaller than the sum of its proper divisors (118188132).

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

65659980 is a wasteful number, since it uses less digits than its factorization.

65659980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094345 (or 1094343 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 48.

The square root of 65659980 is about 8103.0845978553. The cubic root of 65659980 is about 403.4288157402.

The spelling of 65659980 in words is "sixty-five million, six hundred fifty-nine thousand, nine hundred eighty".