669420016 has 20 divisors (see below), whose sum is σ = 1373296032. Its totient is φ = 315021056.

The previous prime is 669420007. The next prime is 669420029. The reversal of 669420016 is 610024966.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1230280 + ... + 1230823.

Almost surely, 2^669420016 is an apocalyptic number.

It is an amenable number.

669420016 is an abundant number, since it is smaller than the sum of its proper divisors (703876016).

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

669420016 is a wasteful number, since it uses less digits than its factorization.

669420016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461128 (or 2461122 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 669420016 is about 25873.1524171292. The cubic root of 669420016 is about 874.7814489811.

The spelling of 669420016 in words is "six hundred sixty-nine million, four hundred twenty thousand, sixteen".