66287572 has 48 divisors (see below), whose sum is σ = 129773952. Its totient is φ = 29427840.

The previous prime is 66287527. The next prime is 66287581. The reversal of 66287572 is 27578266.

Its product of digits (282240) is a multiple of the sum of its prime factors (448).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251913 + ... + 252175.

It is an arithmetic number, because the mean of its divisors is an integer number (2703624).

Almost surely, 2^66287572 is an apocalyptic number.

It is an amenable number.

66287572 is a deficient number, since it is larger than the sum of its proper divisors (63486380).

66287572 is a wasteful number, since it uses less digits than its factorization.

66287572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 66287572 is about 8141.7180005205. The cubic root of 66287572 is about 404.7100948223.

The spelling of 66287572 in words is "sixty-six million, two hundred eighty-seven thousand, five hundred seventy-two".