669777316 has 24 divisors (see below), whose sum is σ = 1282971704. Its totient is φ = 304058880.

The previous prime is 669777239. The next prime is 669777323. The reversal of 669777316 is 613777966.

It can be written as a sum of positive squares in 4 ways, for example, as 22278400 + 647498916 = 4720^2 + 25446^2 .

It is a super-3 number, since 3×669777316³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102405 + ... + 108748.

Almost surely, 2^669777316 is an apocalyptic number.

It is an amenable number.

669777316 is a deficient number, since it is larger than the sum of its proper divisors (613194388).

669777316 is a wasteful number, since it uses less digits than its factorization.

669777316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211231 (or 211229 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 52.

The square root of 669777316 is about 25880.0563368784. The cubic root of 669777316 is about 874.9370582208.

The spelling of 669777316 in words is "six hundred sixty-nine million, seven hundred seventy-seven thousand, three hundred sixteen".