669700 has 36 divisors (see below), whose sum is σ = 1500772. Its totient is φ = 259200.

The previous prime is 669689. The next prime is 669701. The reversal of 669700 is 7966.

669700 = T₁₁ + T₁₂ + ... + T₁₅₈.

It can be written as a sum of positive squares in 6 ways, for example, as 42436 + 627264 = 206^2 + 792^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (669701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3610 + ... + 3790.

2⁶⁶⁹⁷⁰⁰ 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 669700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (750386).

669700 is an abundant number, since it is smaller than the sum of its proper divisors (831072).

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

669700 is a wasteful number, since it uses less digits than its factorization.

669700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 669700 is about 818.3520025026. The cubic root of 669700 is about 87.4903390694.

It can be divided in two parts, 669 and 700, that added together give a square (1369 = 37²).

The spelling of 669700 in words is "six hundred sixty-nine thousand, seven hundred".