668525253 has 8 divisors (see below), whose sum is σ = 972400416. Its totient is φ = 405166800.

The previous prime is 668525251. The next prime is 668525309. The reversal of 668525253 is 352525866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668525253 - 2¹ = 668525251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668525251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10129138 + ... + 10129203.

It is an arithmetic number, because the mean of its divisors is an integer number (121550052).

Almost surely, 2^668525253 is an apocalyptic number.

It is an amenable number.

668525253 is a deficient number, since it is larger than the sum of its proper divisors (303875163).

668525253 is a wasteful number, since it uses less digits than its factorization.

668525253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20258355.

The product of its digits is 432000, while the sum is 42.

The square root of 668525253 is about 25855.8552943042. The cubic root of 668525253 is about 874.3915238473.

The spelling of 668525253 in words is "six hundred sixty-eight million, five hundred twenty-five thousand, two hundred fifty-three".