669387590 has 16 divisors (see below), whose sum is σ = 1205402688. Its totient is φ = 267642816.

The previous prime is 669387581. The next prime is 669387647. The reversal of 669387590 is 95783966.

669387590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13619 + ... + 39041.

It is an arithmetic number, because the mean of its divisors is an integer number (75337668).

Almost surely, 2^669387590 is an apocalyptic number.

669387590 is a deficient number, since it is larger than the sum of its proper divisors (536015098).

669387590 is a wasteful number, since it uses less digits than its factorization.

669387590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28063.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 669387590 is about 25872.5257754244. The cubic root of 669387590 is about 874.7673242559.

The spelling of 669387590 in words is "six hundred sixty-nine million, three hundred eighty-seven thousand, five hundred ninety".