65612005 has 16 divisors (see below), whose sum is σ = 80150400. Its totient is φ = 51554880.

The previous prime is 65612003. The next prime is 65612051. The reversal of 65612005 is 50021656.

It is not a de Polignac number, because 65612005 - 2¹ = 65612003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65612003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70936 + ... + 71854.

It is an arithmetic number, because the mean of its divisors is an integer number (5009400).

Almost surely, 2^65612005 is an apocalyptic number.

It is an amenable number.

65612005 is a deficient number, since it is larger than the sum of its proper divisors (14538395).

65612005 is a wasteful number, since it uses less digits than its factorization.

65612005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 65612005 is about 8100.1237644866. The cubic root of 65612005 is about 403.3305356149.

The spelling of 65612005 in words is "sixty-five million, six hundred twelve thousand, five".