669726677312 has 112 divisors (see below), whose sum is σ = 1660107830400. Its totient is φ = 260430643200.

The previous prime is 669726677309. The next prime is 669726677327. The reversal of 669726677312 is 213776627966.

It is a tau number, because it is divible by the number of its divisors (112).

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, 2437064 + ... + 2697912.

Almost surely, 2^669726677312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669726677312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830053915200).

669726677312 is an abundant number, since it is smaller than the sum of its proper divisors (990381153088).

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

669726677312 is a wasteful number, since it uses less digits than its factorization.

669726677312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261400 (or 261390 counting only the distinct ones).

The product of its digits is 48009024, while the sum is 62.

The spelling of 669726677312 in words is "six hundred sixty-nine billion, seven hundred twenty-six million, six hundred seventy-seven thousand, three hundred twelve".