66655472 has 40 divisors (see below), whose sum is σ = 145136544. Its totient is φ = 29424384.

The previous prime is 66655469. The next prime is 66655481. The reversal of 66655472 is 27455666.

It is a congruent number.

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, 2183 + ... + 11750.

Almost surely, 2^66655472 is an apocalyptic number.

It is an amenable number.

66655472 is an abundant number, since it is smaller than the sum of its proper divisors (78481072).

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

66655472 is a wasteful number, since it uses less digits than its factorization.

66655472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13977 (or 13971 counting only the distinct ones).

The product of its digits is 302400, while the sum is 41.

The square root of 66655472 is about 8164.2802499669. The cubic root of 66655472 is about 405.4574356931.

The spelling of 66655472 in words is "sixty-six million, six hundred fifty-five thousand, four hundred seventy-two".