669173400 has 432 divisors, whose sum is σ = 2720685240. Its totient is φ = 152409600.

The previous prime is 669173381. The next prime is 669173419. The reversal of 669173400 is 4371966.

669173400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (669173381) and next prime (669173419).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2381260 + ... + 2381540.

Almost surely, 2^669173400 is an apocalyptic number.

669173400 is a gapful number since it is divisible by the number (60) 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 669173400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1360342620).

669173400 is an abundant number, since it is smaller than the sum of its proper divisors (2051511840).

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

669173400 is a wasteful number, since it uses less digits than its factorization.

669173400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 669173400 is about 25868.3861112362. The cubic root of 669173400 is about 874.6740118990.

The spelling of 669173400 in words is "six hundred sixty-nine million, one hundred seventy-three thousand, four hundred".