669152471640 has 64 divisors (see below), whose sum is σ = 2076680095200. Its totient is φ = 172287532032.

The previous prime is 669152471627. The next prime is 669152471671. The reversal of 669152471640 is 46174251966.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 96139117 + ... + 96146076.

Almost surely, 2^669152471640 is an apocalyptic number.

669152471640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

669152471640 is an abundant number, since it is smaller than the sum of its proper divisors (1407527623560).

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

669152471640 is a wasteful number, since it uses less digits than its factorization.

669152471640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192285236 (or 192285232 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 669152471640 in words is "six hundred sixty-nine billion, one hundred fifty-two million, four hundred seventy-one thousand, six hundred forty".