669390120 has 192 divisors, whose sum is σ = 2495975040. Its totient is φ = 152409600.

The previous prime is 669390107. The next prime is 669390131. The reversal of 669390120 is 21093966.

It is a super-2 number, since 2×669390120² = 896166265507228800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1237050 + ... + 1237590.

It is an arithmetic number, because the mean of its divisors is an integer number (12999870).

Almost surely, 2^669390120 is an apocalyptic number.

669390120 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 669390120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1247987520).

669390120 is an abundant number, since it is smaller than the sum of its proper divisors (1826584920).

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

669390120 is a wasteful number, since it uses less digits than its factorization.

669390120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 669390120 is about 25872.5746689424. The cubic root of 669390120 is about 874.7684263372.

The spelling of 669390120 in words is "six hundred sixty-nine million, three hundred ninety thousand, one hundred twenty".