669786899 has 8 divisors (see below), whose sum is σ = 700866432. Its totient is φ = 639299520.

The previous prime is 669786889. The next prime is 669786907. The reversal of 669786899 is 998687966.

669786899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 669786899 - 2⁴ = 669786883 is a prime.

It is a super-2 number, since 2×669786899² = 897228980144072402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669786809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145724 + ... + 150249.

It is an arithmetic number, because the mean of its divisors is an integer number (87608304).

Almost surely, 2^669786899 is an apocalyptic number.

669786899 is a deficient number, since it is larger than the sum of its proper divisors (31079533).

669786899 is a wasteful number, since it uses less digits than its factorization.

669786899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296077.

The product of its digits is 70543872, while the sum is 68.

The square root of 669786899 is about 25880.2414787807. The cubic root of 669786899 is about 874.9412309917.

The spelling of 669786899 in words is "six hundred sixty-nine million, seven hundred eighty-six thousand, eight hundred ninety-nine".