666225696 has 48 divisors (see below), whose sum is σ = 1750720608. Its totient is φ = 221836800.

The previous prime is 666225691. The next prime is 666225697. The reversal of 666225696 is 696522666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (666225691) 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, 101556 + ... + 107916.

It is an arithmetic number, because the mean of its divisors is an integer number (36473346).

Almost surely, 2^666225696 is an apocalyptic number.

It is an amenable number.

666225696 is an abundant number, since it is smaller than the sum of its proper divisors (1084494912).

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

666225696 is a wasteful number, since it uses less digits than its factorization.

666225696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7465 (or 7457 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 48.

The square root of 666225696 is about 25811.3482019053. The cubic root of 666225696 is about 873.3878105727.

The spelling of 666225696 in words is "six hundred sixty-six million, two hundred twenty-five thousand, six hundred ninety-six".