669230689872 has 40 divisors (see below), whose sum is σ = 1819837843360. Its totient is φ = 211336007040.

The previous prime is 669230689871. The next prime is 669230689921. The reversal of 669230689872 is 278986032966.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669230689871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366901879 + ... + 366903702.

It is an arithmetic number, because the mean of its divisors is an integer number (45495946084).

Almost surely, 2^669230689872 is an apocalyptic number.

It is an amenable number.

669230689872 is an abundant number, since it is smaller than the sum of its proper divisors (1150607153488).

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

669230689872 is a wasteful number, since it uses less digits than its factorization.

669230689872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733805611 (or 733805605 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 66.

The spelling of 669230689872 in words is "six hundred sixty-nine billion, two hundred thirty million, six hundred eighty-nine thousand, eight hundred seventy-two".