66468888 has 24 divisors (see below), whose sum is σ = 180020100. Its totient is φ = 22156272.

The previous prime is 66468881. The next prime is 66468893. The reversal of 66468888 is 88886466.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×66468888² = 8836226143913088, which contains 22 as substring.

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 (66468881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 461518 + ... + 461661.

Almost surely, 2^66468888 is an apocalyptic number.

It is an amenable number.

66468888 is an abundant number, since it is smaller than the sum of its proper divisors (113551212).

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

66468888 is a wasteful number, since it uses less digits than its factorization.

66468888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923191 (or 923184 counting only the distinct ones).

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

The square root of 66468888 is about 8152.8453928674. The cubic root of 66468888 is about 405.0787592600.

The spelling of 66468888 in words is "sixty-six million, four hundred sixty-eight thousand, eight hundred eighty-eight".