669736851 has 12 divisors (see below), whose sum is σ = 1038775752. Its totient is φ = 382706688.

The previous prime is 669736829. The next prime is 669736883. The reversal of 669736851 is 158637966.

It is not a de Polignac number, because 669736851 - 2¹⁹ = 669212563 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 669736794 and 669736803.

It is not an unprimeable number, because it can be changed into a prime (669736801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2277870 + ... + 2278163.

It is an arithmetic number, because the mean of its divisors is an integer number (86564646).

Almost surely, 2^669736851 is an apocalyptic number.

669736851 is a deficient number, since it is larger than the sum of its proper divisors (369038901).

669736851 is a wasteful number, since it uses less digits than its factorization.

669736851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556050 (or 4556043 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 669736851 is about 25879.2745454736. The cubic root of 669736851 is about 874.9194379161.

The spelling of 669736851 in words is "six hundred sixty-nine million, seven hundred thirty-six thousand, eight hundred fifty-one".