64668388 has 12 divisors (see below), whose sum is σ = 115801840. Its totient is φ = 31582152.

The previous prime is 64668377. The next prime is 64668389. The reversal of 64668388 is 88386646.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64668389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187818 + ... + 188161.

Almost surely, 2^64668388 is an apocalyptic number.

It is an amenable number.

64668388 is a deficient number, since it is larger than the sum of its proper divisors (51133452).

64668388 is a wasteful number, since it uses less digits than its factorization.

64668388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376026 (or 376024 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

The square root of 64668388 is about 8041.6657478411. The cubic root of 64668388 is about 401.3876554640.

It can be divided in two parts, 64668 and 388, that added together give a palindrome (65056).

The spelling of 64668388 in words is "sixty-four million, six hundred sixty-eight thousand, three hundred eighty-eight".