669892380 has 24 divisors (see below), whose sum is σ = 1875698832. Its totient is φ = 178637952.

The previous prime is 669892369. The next prime is 669892381. The reversal of 669892380 is 83298966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669892381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5582377 + ... + 5582496.

It is an arithmetic number, because the mean of its divisors is an integer number (78154118).

Almost surely, 2^669892380 is an apocalyptic number.

669892380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

669892380 is an abundant number, since it is smaller than the sum of its proper divisors (1205806452).

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

669892380 is a wasteful number, since it uses less digits than its factorization.

669892380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11164885 (or 11164883 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 669892380 is about 25882.2792659379. The cubic root of 669892380 is about 874.9871584510.

The spelling of 669892380 in words is "six hundred sixty-nine million, eight hundred ninety-two thousand, three hundred eighty".