66125474 has 4 divisors (see below), whose sum is σ = 99188214. Its totient is φ = 33062736.

The previous prime is 66125459. The next prime is 66125513. The reversal of 66125474 is 47452166.

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

It can be written as a sum of positive squares in only one way, i.e., 59182249 + 6943225 = 7693^2 + 2635^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16531367 + ... + 16531370.

Almost surely, 2^66125474 is an apocalyptic number.

66125474 is a deficient number, since it is larger than the sum of its proper divisors (33062740).

66125474 is a wasteful number, since it uses less digits than its factorization.

66125474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33062739.

The product of its digits is 40320, while the sum is 35.

The square root of 66125474 is about 8131.7571286900. The cubic root of 66125474 is about 404.3799361810.

The spelling of 66125474 in words is "sixty-six million, one hundred twenty-five thousand, four hundred seventy-four".