66711272 has 16 divisors (see below), whose sum is σ = 125190240. Its totient is φ = 33327216.

The previous prime is 66711263. The next prime is 66711277. The reversal of 66711272 is 27211766.

It is not an unprimeable number, because it can be changed into a prime (66711277) 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, 9053 + ... + 14675.

It is an arithmetic number, because the mean of its divisors is an integer number (7824390).

Almost surely, 2^66711272 is an apocalyptic number.

It is an amenable number.

66711272 is a deficient number, since it is larger than the sum of its proper divisors (58478968).

66711272 is a wasteful number, since it uses less digits than its factorization.

66711272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7112 (or 7108 counting only the distinct ones).

The product of its digits is 7056, while the sum is 32.

The square root of 66711272 is about 8167.6968601926. The cubic root of 66711272 is about 405.5705457592.

The spelling of 66711272 in words is "sixty-six million, seven hundred eleven thousand, two hundred seventy-two".