2669785257 has 8 divisors (see below), whose sum is σ = 3561239776. Its totient is φ = 1779093792.

The previous prime is 2669785249. The next prime is 2669785259. The reversal of 2669785257 is 7525879662.

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

It is not a de Polignac number, because 2669785257 - 2³ = 2669785249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2669785197 and 2669785206.

It is not an unprimeable number, because it can be changed into a prime (2669785259) 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, 182548 + ... + 196629.

It is an arithmetic number, because the mean of its divisors is an integer number (445154972).

Almost surely, 2^2669785257 is an apocalyptic number.

It is an amenable number.

2669785257 is a deficient number, since it is larger than the sum of its proper divisors (891454519).

2669785257 is a wasteful number, since it uses less digits than its factorization.

2669785257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381527.

The product of its digits is 12700800, while the sum is 57.

The square root of 2669785257 is about 51669.9647474236. The cubic root of 2669785257 is about 1387.2629155501.

The spelling of 2669785257 in words is "two billion, six hundred sixty-nine million, seven hundred eighty-five thousand, two hundred fifty-seven".