2257666357 has 4 divisors (see below), whose sum is σ = 2330494336. Its totient is φ = 2184838380.

The previous prime is 2257666331. The next prime is 2257666363. The reversal of 2257666357 is 7536667522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2257666357 - 2¹¹ = 2257664309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2257666357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257666057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36413943 + ... + 36414004.

It is an arithmetic number, because the mean of its divisors is an integer number (582623584).

Almost surely, 2^2257666357 is an apocalyptic number.

It is an amenable number.

2257666357 is a deficient number, since it is larger than the sum of its proper divisors (72827979).

2257666357 is an equidigital number, since it uses as much as digits as its factorization.

2257666357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72827978.

The product of its digits is 3175200, while the sum is 49.

The square root of 2257666357 is about 47514.9066820088. The cubic root of 2257666357 is about 1311.8572721512.

The spelling of 2257666357 in words is "two billion, two hundred fifty-seven million, six hundred sixty-six thousand, three hundred fifty-seven".