669256284 has 24 divisors (see below), whose sum is σ = 1599686928. Its totient is φ = 217644160.

The previous prime is 669256283. The next prime is 669256309. The reversal of 669256284 is 482652966.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669256283) 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, 679647 + ... + 680630.

It is an arithmetic number, because the mean of its divisors is an integer number (66653622).

Almost surely, 2^669256284 is an apocalyptic number.

It is an amenable number.

669256284 is an abundant number, since it is smaller than the sum of its proper divisors (930430644).

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

669256284 is a wasteful number, since it uses less digits than its factorization.

669256284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360325 (or 1360323 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 669256284 is about 25869.9880943150. The cubic root of 669256284 is about 874.7101228621.

The spelling of 669256284 in words is "six hundred sixty-nine million, two hundred fifty-six thousand, two hundred eighty-four".