66662445 has 16 divisors (see below), whose sum is σ = 110338560. Its totient is φ = 34327104.

The previous prime is 66662437. The next prime is 66662461. The reversal of 66662445 is 54426666.

It is not a de Polignac number, because 66662445 - 2³ = 66662437 is a prime.

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, 76189 + ... + 77058.

It is an arithmetic number, because the mean of its divisors is an integer number (6896160).

Almost surely, 2^66662445 is an apocalyptic number.

It is an amenable number.

66662445 is a deficient number, since it is larger than the sum of its proper divisors (43676115).

66662445 is a wasteful number, since it uses less digits than its factorization.

66662445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153284.

The product of its digits is 207360, while the sum is 39.

The square root of 66662445 is about 8164.7072819544. The cubic root of 66662445 is about 405.4715738477.

The spelling of 66662445 in words is "sixty-six million, six hundred sixty-two thousand, four hundred forty-five".