72066712 has 16 divisors (see below), whose sum is σ = 135689400. Its totient is φ = 35882880.

The previous prime is 72066707. The next prime is 72066719. The reversal of 72066712 is 21766027.

It is a super-2 number, since 2×72066712² = 10387221956981888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72066719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16762 + ... + 20617.

Almost surely, 2^72066712 is an apocalyptic number.

It is an amenable number.

72066712 is a deficient number, since it is larger than the sum of its proper divisors (63622688).

72066712 is a wasteful number, since it uses less digits than its factorization.

72066712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37626 (or 37622 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 72066712 is about 8489.2115063768. The cubic root of 72066712 is about 416.1452124953.

The spelling of 72066712 in words is "seventy-two million, sixty-six thousand, seven hundred twelve".