66125894 has 4 divisors (see below), whose sum is σ = 99188844. Its totient is φ = 33062946.

The previous prime is 66125881. The next prime is 66125911. The reversal of 66125894 is 49852166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16531472 + ... + 16531475.

It is an arithmetic number, because the mean of its divisors is an integer number (24797211).

Almost surely, 2^66125894 is an apocalyptic number.

66125894 is a deficient number, since it is larger than the sum of its proper divisors (33062950).

66125894 is a wasteful number, since it uses less digits than its factorization.

66125894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33062949.

The product of its digits is 103680, while the sum is 41.

The square root of 66125894 is about 8131.7829533258. The cubic root of 66125894 is about 404.3807923271.

The spelling of 66125894 in words is "sixty-six million, one hundred twenty-five thousand, eight hundred ninety-four".