66923712 has 56 divisors (see below), whose sum is σ = 196748400. Its totient is φ = 22307328.

The previous prime is 66923707. The next prime is 66923729. The reversal of 66923712 is 21732966.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 17637 + ... + 21092.

Almost surely, 2^66923712 is an apocalyptic number.

It is an amenable number.

66923712 is an abundant number, since it is smaller than the sum of its proper divisors (129824688).

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

66923712 is a wasteful number, since it uses less digits than its factorization.

66923712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38750 (or 38734 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 66923712 is about 8180.6914133220. The cubic root of 66923712 is about 406.0005985739. Note that the first 3 decimals are identical.

It can be divided in two parts, 6692 and 3712, that added together give a square (10404 = 102²).

The spelling of 66923712 in words is "sixty-six million, nine hundred twenty-three thousand, seven hundred twelve".