669922606144 has 189 divisors, whose sum is σ = 1493487170119. Its totient is φ = 297929632000.

The previous prime is 669922606141. The next prime is 669922606147. The reversal of 669922606144 is 441606229966.

The square root of 669922606144 is 818488.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (669922606141) and next prime (669922606147).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669922606141) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5113912959 + ... + 5113913089.

Almost surely, 2^669922606144 is an apocalyptic number.

669922606144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

669922606144 is the 818488-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669922606144

669922606144 is an abundant number, since it is smaller than the sum of its proper divisors (823564563975).

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

669922606144 is an equidigital number, since it uses as much as digits as its factorization.

669922606144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 669922606144 in words is "six hundred sixty-nine billion, nine hundred twenty-two million, six hundred six thousand, one hundred forty-four".