669776449104 has 320 divisors, whose sum is σ = 2260059156480. Its totient is φ = 185901765120.

The previous prime is 669776449103. The next prime is 669776449157. The reversal of 669776449104 is 401944677966.

669776449104 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×669776449104³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669776449103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77310277 + ... + 77318939.

It is an arithmetic number, because the mean of its divisors is an integer number (7062684864).

Almost surely, 2^669776449104 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 669776449104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130029578240).

669776449104 is an abundant number, since it is smaller than the sum of its proper divisors (1590282707376).

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

669776449104 is a wasteful number, since it uses less digits than its factorization.

669776449104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9415 (or 9403 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 669776449104 in words is "six hundred sixty-nine billion, seven hundred seventy-six million, four hundred forty-nine thousand, one hundred four".