669760772 has 6 divisors (see below), whose sum is σ = 1172081358. Its totient is φ = 334880384.

The previous prime is 669760753. The next prime is 669760783. The reversal of 669760772 is 277067966.

It can be written as a sum of positive squares in only one way, i.e., 555356356 + 114404416 = 23566^2 + 10696^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 669760772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83720093 + ... + 83720100.

It is an arithmetic number, because the mean of its divisors is an integer number (195346893).

Almost surely, 2^669760772 is an apocalyptic number.

It is an amenable number.

669760772 is a deficient number, since it is larger than the sum of its proper divisors (502320586).

669760772 is a wasteful number, since it uses less digits than its factorization.

669760772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167440197 (or 167440195 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 50.

The square root of 669760772 is about 25879.7367065432. The cubic root of 669760772 is about 874.9298542952.

The spelling of 669760772 in words is "six hundred sixty-nine million, seven hundred sixty thousand, seven hundred seventy-two".