66500472 has 32 divisors (see below), whose sum is σ = 166855680. Its totient is φ = 22086240.

The previous prime is 66500471. The next prime is 66500479. The reversal of 66500472 is 27400566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66500471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897 + ... + 11687.

It is an arithmetic number, because the mean of its divisors is an integer number (5214240).

Almost surely, 2^66500472 is an apocalyptic number.

It is an amenable number.

66500472 is an abundant number, since it is smaller than the sum of its proper divisors (100355208).

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

66500472 is a wasteful number, since it uses less digits than its factorization.

66500472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10083 (or 10079 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 66500472 is about 8154.7821552755. The cubic root of 66500472 is about 405.1429094813.

The spelling of 66500472 in words is "sixty-six million, five hundred thousand, four hundred seventy-two".