66215282925 has 48 divisors (see below), whose sum is σ = 120340154880. Its totient is φ = 31859256000.

The previous prime is 66215282899. The next prime is 66215282963. The reversal of 66215282925 is 52928251266.

It is not a de Polignac number, because 66215282925 - 2⁸ = 66215282669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198265 + ... + 414414.

It is an arithmetic number, because the mean of its divisors is an integer number (2507086560).

Almost surely, 2^66215282925 is an apocalyptic number.

It is an amenable number.

66215282925 is a deficient number, since it is larger than the sum of its proper divisors (54124871955).

66215282925 is a wasteful number, since it uses less digits than its factorization.

66215282925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612834 (or 612829 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 48.

The spelling of 66215282925 in words is "sixty-six billion, two hundred fifteen million, two hundred eighty-two thousand, nine hundred twenty-five".