669730374456 has 192 divisors, whose sum is σ = 1983761694720. Its totient is φ = 186777077760.

The previous prime is 669730374451. The next prime is 669730374491. The reversal of 669730374456 is 654473037966.

It is a happy number.

669730374456 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 669730374456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669730374451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15013321 + ... + 15057863.

It is an arithmetic number, because the mean of its divisors is an integer number (10332092160).

Almost surely, 2^669730374456 is an apocalyptic number.

669730374456 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669730374456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991880847360).

669730374456 is an abundant number, since it is smaller than the sum of its proper divisors (1314031320264).

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

669730374456 is a wasteful number, since it uses less digits than its factorization.

669730374456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44926 (or 44909 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 60.

The spelling of 669730374456 in words is "six hundred sixty-nine billion, seven hundred thirty million, three hundred seventy-four thousand, four hundred fifty-six".