525425666 has 4 divisors (see below), whose sum is σ = 788138502. Its totient is φ = 262712832.

The previous prime is 525425657. The next prime is 525425689. The reversal of 525425666 is 666524525.

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., 511890625 + 13535041 = 22625^2 + 3679^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131356415 + ... + 131356418.

Almost surely, 2^525425666 is an apocalyptic number.

525425666 is a deficient number, since it is larger than the sum of its proper divisors (262712836).

525425666 is a wasteful number, since it uses less digits than its factorization.

525425666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262712835.

The product of its digits is 432000, while the sum is 41.

The square root of 525425666 is about 22922.1653863678. The cubic root of 525425666 is about 806.9322900564.

The spelling of 525425666 in words is "five hundred twenty-five million, four hundred twenty-five thousand, six hundred sixty-six".