65980604400 has 60 divisors (see below), whose sum is σ = 211357873272. Its totient is φ = 17594827520.

The previous prime is 65980604381. The next prime is 65980604407. The reversal of 65980604400 is 440608956.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65980604407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27490719 + ... + 27493118.

Almost surely, 2^65980604400 is an apocalyptic number.

65980604400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65980604400 is an abundant number, since it is smaller than the sum of its proper divisors (145377268872).

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

65980604400 is a wasteful number, since it uses less digits than its factorization.

65980604400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54983858 (or 54983847 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 65980604400 in words is "sixty-five billion, nine hundred eighty million, six hundred four thousand, four hundred".