669683700 has 432 divisors, whose sum is σ = 2588278784. Its totient is φ = 146966400.

The previous prime is 669683699. The next prime is 669683701. The reversal of 669683700 is 7386966.

It is an interprime number because it is at equal distance from previous prime (669683699) and next prime (669683701).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669683701) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 5273037 + ... + 5273163.

Almost surely, 2^669683700 is an apocalyptic number.

669683700 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 669683700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294139392).

669683700 is an abundant number, since it is smaller than the sum of its proper divisors (1918595084).

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

669683700 is a wasteful number, since it uses less digits than its factorization.

669683700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 669683700 is about 25878.2476222792. The cubic root of 669683700 is about 874.8962924707.

The spelling of 669683700 in words is "six hundred sixty-nine million, six hundred eighty-three thousand, seven hundred".