66747468 has 24 divisors (see below), whose sum is σ = 156448768. Its totient is φ = 22148496.

The previous prime is 66747431. The next prime is 66747479. The reversal of 66747468 is 86474766.

It is a happy number.

It is a super-2 number, since 2×66747468² = 8910448968822048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9796 + ... + 15147.

Almost surely, 2^66747468 is an apocalyptic number.

It is an amenable number.

66747468 is an abundant number, since it is smaller than the sum of its proper divisors (89701300).

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

66747468 is a wasteful number, since it uses less digits than its factorization.

66747468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25173 (or 25171 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 48.

The square root of 66747468 is about 8169.9123618311. The cubic root of 66747468 is about 405.6438835767.

The spelling of 66747468 in words is "sixty-six million, seven hundred forty-seven thousand, four hundred sixty-eight".