66727628 has 18 divisors (see below), whose sum is σ = 128355108. Its totient is φ = 30330520.

The previous prime is 66727559. The next prime is 66727667. The reversal of 66727628 is 82672766.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68450 + ... + 69417.

Almost surely, 2^66727628 is an apocalyptic number.

It is an amenable number.

66727628 is a deficient number, since it is larger than the sum of its proper divisors (61627480).

66727628 is a wasteful number, since it uses less digits than its factorization.

66727628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137893 (or 137880 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 66727628 is about 8168.6980602786. The cubic root of 66727628 is about 405.6036884331.

The spelling of 66727628 in words is "sixty-six million, seven hundred twenty-seven thousand, six hundred twenty-eight".