669244896 has 48 divisors (see below), whose sum is σ = 1951966800. Its totient is φ = 223081344.

The previous prime is 669244879. The next prime is 669244897. The reversal of 669244896 is 698442966.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669244897) 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, 386431 + ... + 388158.

It is an arithmetic number, because the mean of its divisors is an integer number (40665975).

Almost surely, 2^669244896 is an apocalyptic number.

It is an amenable number.

669244896 is an abundant number, since it is smaller than the sum of its proper divisors (1282721904).

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

669244896 is a wasteful number, since it uses less digits than its factorization.

669244896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774608 (or 774594 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 669244896 is about 25869.7679927749. The cubic root of 669244896 is about 874.7051615064.

The spelling of 669244896 in words is "six hundred sixty-nine million, two hundred forty-four thousand, eight hundred ninety-six".