65621412 has 36 divisors (see below), whose sum is σ = 166407696. Its totient is φ = 21803760.

The previous prime is 65621407. The next prime is 65621431. The reversal of 65621412 is 21412656.

65621412 is a `hidden beast` number, since 656 + 2 + 1 + 4 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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, 9163 + ... + 14669.

It is an arithmetic number, because the mean of its divisors is an integer number (4622436).

Almost surely, 2^65621412 is an apocalyptic number.

It is an amenable number.

65621412 is an abundant number, since it is smaller than the sum of its proper divisors (100786284).

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

65621412 is a wasteful number, since it uses less digits than its factorization.

65621412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5848 (or 5843 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 65621412 is about 8100.7044138149. The cubic root of 65621412 is about 403.3498102839.

The spelling of 65621412 in words is "sixty-five million, six hundred twenty-one thousand, four hundred twelve".