669034240 has 108 divisors (see below), whose sum is σ = 1864361016. Its totient is φ = 229361664.

The previous prime is 669034229. The next prime is 669034243. The reversal of 669034240 is 42430966.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 669034196 and 669034205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669034243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57387 + ... + 68053.

It is an arithmetic number, because the mean of its divisors is an integer number (17262602).

Almost surely, 2^669034240 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 669034240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (932180508).

669034240 is an abundant number, since it is smaller than the sum of its proper divisors (1195326776).

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

669034240 is a wasteful number, since it uses less digits than its factorization.

669034240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10702 (or 10681 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 669034240 is about 25865.6962017263. The cubic root of 669034240 is about 874.6133758596.

The spelling of 669034240 in words is "six hundred sixty-nine million, thirty-four thousand, two hundred forty".