669818572002 has 48 divisors (see below), whose sum is σ = 1502039298240. Its totient is φ = 215470149216.

The previous prime is 669818571997. The next prime is 669818572037. The reversal of 669818572002 is 200275818966.

669818572002 is a `hidden beast` number, since 6 + 69 + 8 + 1 + 8 + 572 + 0 + 0 + 2 = 666.

669818572002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 669818572002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 781993 + ... + 1396835.

It is an arithmetic number, because the mean of its divisors is an integer number (31292485380).

Almost surely, 2^669818572002 is an apocalyptic number.

669818572002 is an abundant number, since it is smaller than the sum of its proper divisors (832220726238).

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

669818572002 is a wasteful number, since it uses less digits than its factorization.

669818572002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616967 (or 616964 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 669818572002 in words is "six hundred sixty-nine billion, eight hundred eighteen million, five hundred seventy-two thousand, two".