669771602 has 8 divisors (see below), whose sum is σ = 1014604812. Its totient is φ = 331570000.

The previous prime is 669771589. The next prime is 669771629. The reversal of 669771602 is 206177966.

It can be written as a sum of positive squares in 2 ways, for example, as 470933401 + 198838201 = 21701^2 + 14101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1657649 + ... + 1658052.

Almost surely, 2^669771602 is an apocalyptic number.

669771602 is a deficient number, since it is larger than the sum of its proper divisors (344833210).

669771602 is a wasteful number, since it uses less digits than its factorization.

669771602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315804.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 669771602 is about 25879.9459427565. The cubic root of 669771602 is about 874.9345701279.

The spelling of 669771602 in words is "six hundred sixty-nine million, seven hundred seventy-one thousand, six hundred two".