72066708 has 36 divisors (see below), whose sum is σ = 208193440. Its totient is φ = 20590416.

The previous prime is 72066707. The next prime is 72066719. The reversal of 72066708 is 80766027.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×72066708² = 10387220803914528, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72066707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142738 + ... + 143241.

Almost surely, 2^72066708 is an apocalyptic number.

It is an amenable number.

72066708 is an abundant number, since it is smaller than the sum of its proper divisors (136126732).

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

72066708 is a wasteful number, since it uses less digits than its factorization.

72066708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285996 (or 285991 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 72066708 is about 8489.2112707836. The cubic root of 72066708 is about 416.1452047961.

The spelling of 72066708 in words is "seventy-two million, sixty-six thousand, seven hundred eight".