65612961 has 12 divisors (see below), whose sum is σ = 95086992. Its totient is φ = 43597656.

The previous prime is 65612959. The next prime is 65612983. The reversal of 65612961 is 16921656.

65612961 is a `hidden beast` number, since 6 + 561 + 2 + 96 + 1 = 666.

65612961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65612961 - 2¹ = 65612959 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65612161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9111 + ... + 14636.

It is an arithmetic number, because the mean of its divisors is an integer number (7923916).

Almost surely, 2^65612961 is an apocalyptic number.

It is an amenable number.

65612961 is a deficient number, since it is larger than the sum of its proper divisors (29474031).

65612961 is a wasteful number, since it uses less digits than its factorization.

65612961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24060 (or 24057 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 65612961 is about 8100.1827757156. The cubic root of 65612961 is about 403.3324945152.

The spelling of 65612961 in words is "sixty-five million, six hundred twelve thousand, nine hundred sixty-one".