66425634 has 48 divisors (see below), whose sum is σ = 165278880. Its totient is φ = 19068480.

The previous prime is 66425621. The next prime is 66425641. The reversal of 66425634 is 43652466.

66425634 is a `hidden beast` number, since 6 + 642 + 5 + 6 + 3 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5067 + ... + 12590.

It is an arithmetic number, because the mean of its divisors is an integer number (3443310).

Almost surely, 2^66425634 is an apocalyptic number.

66425634 is an abundant number, since it is smaller than the sum of its proper divisors (98853246).

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

66425634 is a wasteful number, since it uses less digits than its factorization.

66425634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17695 (or 17692 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66425634 is about 8150.1922676707. The cubic root of 66425634 is about 404.9908731368.

The spelling of 66425634 in words is "sixty-six million, four hundred twenty-five thousand, six hundred thirty-four".