66625224004 has 6 divisors (see below), whose sum is σ = 116594142014. Its totient is φ = 33312612000.

The previous prime is 66625223969. The next prime is 66625224011. The reversal of 66625224004 is 40042252666.

It can be written as a sum of positive squares in only one way, i.e., 64263264004 + 2361960000 = 253502^2 + 48600^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8328152997 + ... + 8328153004.

Almost surely, 2^66625224004 is an apocalyptic number.

It is an amenable number.

66625224004 is a deficient number, since it is larger than the sum of its proper divisors (49968918010).

66625224004 is a wasteful number, since it uses less digits than its factorization.

66625224004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16656306005 (or 16656306003 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 66625224004 in words is "sixty-six billion, six hundred twenty-five million, two hundred twenty-four thousand, four".