65440612 has 24 divisors (see below), whose sum is σ = 119883456. Its totient is φ = 31197408.

The previous prime is 65440607. The next prime is 65440619. The reversal of 65440612 is 21604456.

It is not an unprimeable number, because it can be changed into a prime (65440619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33363 + ... + 35269.

It is an arithmetic number, because the mean of its divisors is an integer number (4995144).

Almost surely, 2^65440612 is an apocalyptic number.

It is an amenable number.

65440612 is a deficient number, since it is larger than the sum of its proper divisors (54442844).

65440612 is a wasteful number, since it uses less digits than its factorization.

65440612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307 (or 2305 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 65440612 is about 8089.5371931897. The cubic root of 65440612 is about 402.9790333223.

The spelling of 65440612 in words is "sixty-five million, four hundred forty thousand, six hundred twelve".