669786613 has 16 divisors (see below), whose sum is σ = 722304000. Its totient is φ = 619082352.

The previous prime is 669786583. The next prime is 669786629. The reversal of 669786613 is 316687966.

It is a cyclic number.

It is not a de Polignac number, because 669786613 - 2²⁹ = 132915701 is a prime.

It is a super-2 number, since 2×669786613² = 897228213908023538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669786683) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 337458 + ... + 339436.

It is an arithmetic number, because the mean of its divisors is an integer number (45144000).

Almost surely, 2^669786613 is an apocalyptic number.

It is an amenable number.

669786613 is a deficient number, since it is larger than the sum of its proper divisors (52517387).

669786613 is a wasteful number, since it uses less digits than its factorization.

669786613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424.

The product of its digits is 1959552, while the sum is 52.

The square root of 669786613 is about 25880.2359533293. The cubic root of 669786613 is about 874.9411064579.

The spelling of 669786613 in words is "six hundred sixty-nine million, seven hundred eighty-six thousand, six hundred thirteen".