669766900 has 108 divisors (see below), whose sum is σ = 1658893824. Its totient is φ = 232760000.

The previous prime is 669766871. The next prime is 669766931. The reversal of 669766900 is 9667966.

It is a super-2 number, since 2×669766900² = 897175400671220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 581325 + ... + 582475.

It is an arithmetic number, because the mean of its divisors is an integer number (15360128).

Almost surely, 2^669766900 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 669766900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (829446912).

669766900 is an abundant number, since it is smaller than the sum of its proper divisors (989126924).

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

669766900 is a wasteful number, since it uses less digits than its factorization.

669766900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1192 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 669766900 is about 25879.8551000580. The cubic root of 669766900 is about 874.9325226876.

The spelling of 669766900 in words is "six hundred sixty-nine million, seven hundred sixty-six thousand, nine hundred".