66090875 has 16 divisors (see below), whose sum is σ = 83229120. Its totient is φ = 52393600.

The previous prime is 66090859. The next prime is 66090923. The reversal of 66090875 is 57809066.

It is a happy number.

It is not a de Polignac number, because 66090875 - 2⁴ = 66090859 is a prime.

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, 11786 + ... + 16464.

It is an arithmetic number, because the mean of its divisors is an integer number (5201820).

Almost surely, 2^66090875 is an apocalyptic number.

66090875 is a deficient number, since it is larger than the sum of its proper divisors (17138245).

66090875 is a wasteful number, since it uses less digits than its factorization.

66090875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4807 (or 4797 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 66090875 is about 8129.6294503501. The cubic root of 66090875 is about 404.3093956289.

The spelling of 66090875 in words is "sixty-six million, ninety thousand, eight hundred seventy-five".