66662575 has 12 divisors (see below), whose sum is σ = 94470640. Its totient is φ = 45711360.

The previous prime is 66662551. The next prime is 66662611. The reversal of 66662575 is 57526666.

It is not a de Polignac number, because 66662575 - 2¹¹ = 66660527 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190290 + ... + 190639.

Almost surely, 2^66662575 is an apocalyptic number.

66662575 is a deficient number, since it is larger than the sum of its proper divisors (27808065).

66662575 is a wasteful number, since it uses less digits than its factorization.

66662575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380946 (or 380941 counting only the distinct ones).

The product of its digits is 453600, while the sum is 43.

The square root of 66662575 is about 8164.7152430443. The cubic root of 66662575 is about 405.4718374208.

The spelling of 66662575 in words is "sixty-six million, six hundred sixty-two thousand, five hundred seventy-five".