65812072 has 8 divisors (see below), whose sum is σ = 123397650. Its totient is φ = 32906032.

The previous prime is 65812063. The next prime is 65812073. The reversal of 65812072 is 27021856.

It can be written as a sum of positive squares in only one way, i.e., 56040196 + 9771876 = 7486^2 + 3126^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (65812073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4113247 + ... + 4113262.

Almost surely, 2^65812072 is an apocalyptic number.

It is an amenable number.

65812072 is a deficient number, since it is larger than the sum of its proper divisors (57585578).

65812072 is a wasteful number, since it uses less digits than its factorization.

65812072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8226515 (or 8226511 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 65812072 is about 8112.4639906751. The cubic root of 65812072 is about 403.7400706853.

The spelling of 65812072 in words is "sixty-five million, eight hundred twelve thousand, seventy-two".