645366966 has 8 divisors (see below), whose sum is σ = 1290733944. Its totient is φ = 215122320.

The previous prime is 645366947. The next prime is 645366973. The reversal of 645366966 is 669663546.

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

645366966 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53780575 + ... + 53780586.

It is an arithmetic number, because the mean of its divisors is an integer number (161341743).

Almost surely, 2^645366966 is an apocalyptic number.

645366966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

645366966 is a wasteful number, since it uses less digits than its factorization.

645366966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107561166.

The product of its digits is 4199040, while the sum is 51.

The square root of 645366966 is about 25404.0738071672. The cubic root of 645366966 is about 864.1760856172.

The spelling of 645366966 in words is "six hundred forty-five million, three hundred sixty-six thousand, nine hundred sixty-six".