66927620 has 24 divisors (see below), whose sum is σ = 140771904. Its totient is φ = 26728416.

The previous prime is 66927617. The next prime is 66927647. The reversal of 66927620 is 2672966.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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, 12239 + ... + 16841.

It is an arithmetic number, because the mean of its divisors is an integer number (5865496).

Almost surely, 2^66927620 is an apocalyptic number.

It is an amenable number.

66927620 is an abundant number, since it is smaller than the sum of its proper divisors (73844284).

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

66927620 is a wasteful number, since it uses less digits than its factorization.

66927620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339 (or 5337 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 66927620 is about 8180.9302649515. The cubic root of 66927620 is about 406.0085012011.

The spelling of 66927620 in words is "sixty-six million, nine hundred twenty-seven thousand, six hundred twenty".