525421666 has 32 divisors (see below), whose sum is σ = 1014312960. Its totient is φ = 198104400.

The previous prime is 525421657. The next prime is 525421679. The reversal of 525421666 is 666124525.

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, 50256 + ... + 59803.

It is an arithmetic number, because the mean of its divisors is an integer number (31697280).

Almost surely, 2^525421666 is an apocalyptic number.

525421666 is a deficient number, since it is larger than the sum of its proper divisors (488891294).

525421666 is a wasteful number, since it uses less digits than its factorization.

525421666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110110.

The product of its digits is 86400, while the sum is 37.

The square root of 525421666 is about 22922.0781344101. The cubic root of 525421666 is about 806.9302423597.

The spelling of 525421666 in words is "five hundred twenty-five million, four hundred twenty-one thousand, six hundred sixty-six".