669091040 has 24 divisors (see below), whose sum is σ = 1580727960. Its totient is φ = 267636352.

The previous prime is 669091001. The next prime is 669091043. The reversal of 669091040 is 40190966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669091043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090750 + ... + 2091069.

It is an arithmetic number, because the mean of its divisors is an integer number (65863665).

Almost surely, 2^669091040 is an apocalyptic number.

It is an amenable number.

669091040 is an abundant number, since it is smaller than the sum of its proper divisors (911636920).

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

669091040 is a wasteful number, since it uses less digits than its factorization.

669091040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181834 (or 4181826 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 669091040 is about 25866.7941577614. The cubic root of 669091040 is about 874.6381262789.

The spelling of 669091040 in words is "six hundred sixty-nine million, ninety-one thousand, forty".