64668888 has 32 divisors (see below), whose sum is σ = 179636400. Its totient is φ = 21556224.

The previous prime is 64668887. The next prime is 64668889. The reversal of 64668888 is 88886646.

It is an interprime number because it is at equal distance from previous prime (64668887) and next prime (64668889).

It is a Harshad number since it is a multiple of its sum of digits (54).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64668887) 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, 149481 + ... + 149912.

Almost surely, 2^64668888 is an apocalyptic number.

It is an amenable number.

64668888 is an abundant number, since it is smaller than the sum of its proper divisors (114967512).

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

64668888 is a wasteful number, since it uses less digits than its factorization.

64668888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299408 (or 299398 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 54.

The square root of 64668888 is about 8041.6968358674. The cubic root of 64668888 is about 401.3886899381.

It can be divided in two parts, 64668 and 888, that added together give a palindrome (65556).

The spelling of 64668888 in words is "sixty-four million, six hundred sixty-eight thousand, eight hundred eighty-eight".