666522038 has 32 divisors (see below), whose sum is σ = 1245355776. Its totient is φ = 260496288.

The previous prime is 666522023. The next prime is 666522049. The reversal of 666522038 is 830225666.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 666521992 and 666522010.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 6956 + ... + 37167.

It is an arithmetic number, because the mean of its divisors is an integer number (38917368).

Almost surely, 2^666522038 is an apocalyptic number.

666522038 is a deficient number, since it is larger than the sum of its proper divisors (578833738).

666522038 is a wasteful number, since it uses less digits than its factorization.

666522038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44228.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 666522038 is about 25817.0881007134. The cubic root of 666522038 is about 873.5172877786.

The spelling of 666522038 in words is "six hundred sixty-six million, five hundred twenty-two thousand, thirty-eight".