64668744 has 48 divisors (see below), whose sum is σ = 200166720. Its totient is φ = 18476640.

The previous prime is 64668739. The next prime is 64668749. The reversal of 64668744 is 44786646.

It is an interprime number because it is at equal distance from previous prime (64668739) and next prime (64668749).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 64668744.

It is not an unprimeable number, because it can be changed into a prime (64668749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63652 + ... + 64659.

It is an arithmetic number, because the mean of its divisors is an integer number (4170140).

Almost surely, 2^64668744 is an apocalyptic number.

It is an amenable number.

64668744 is an abundant number, since it is smaller than the sum of its proper divisors (135497976).

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

64668744 is a wasteful number, since it uses less digits than its factorization.

64668744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128330 (or 128323 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 64668744 is about 8041.6878825281. The cubic root of 64668744 is about 401.3883920101.

The spelling of 64668744 in words is "sixty-four million, six hundred sixty-eight thousand, seven hundred forty-four".