669066716 has 6 divisors (see below), whose sum is σ = 1170866760. Its totient is φ = 334533356.

The previous prime is 669066701. The next prime is 669066719. The reversal of 669066716 is 617660966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669066719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83633336 + ... + 83633343.

It is an arithmetic number, because the mean of its divisors is an integer number (195144460).

Almost surely, 2^669066716 is an apocalyptic number.

It is an amenable number.

669066716 is a deficient number, since it is larger than the sum of its proper divisors (501800044).

669066716 is a wasteful number, since it uses less digits than its factorization.

669066716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167266683 (or 167266681 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 669066716 is about 25866.3239753932. The cubic root of 669066716 is about 874.6275273448.

The spelling of 669066716 in words is "six hundred sixty-nine million, sixty-six thousand, seven hundred sixteen".