66250038 has 32 divisors (see below), whose sum is σ = 139115520. Its totient is φ = 21005280.

The previous prime is 66250027. The next prime is 66250073. The reversal of 66250038 is 83005266.

It is a junction number, because it is equal to n+sod(n) for n = 66249987 and 66250014.

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, 7956 + ... + 13992.

It is an arithmetic number, because the mean of its divisors is an integer number (4347360).

Almost surely, 2^66250038 is an apocalyptic number.

66250038 is an abundant number, since it is smaller than the sum of its proper divisors (72865482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66250038 is a wasteful number, since it uses less digits than its factorization.

66250038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66250038 is about 8139.4126323710. The cubic root of 66250038 is about 404.6336940922.

The spelling of 66250038 in words is "sixty-six million, two hundred fifty thousand, thirty-eight".