2664857851 has 4 divisors (see below), whose sum is σ = 2665105000. Its totient is φ = 2664610704.

The previous prime is 2664857849. The next prime is 2664857857. The reversal of 2664857851 is 1587584662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2664857851 - 2¹ = 2664857849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2664857857) 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, 106626 + ... + 129223.

It is an arithmetic number, because the mean of its divisors is an integer number (666276250).

Almost surely, 2^2664857851 is an apocalyptic number.

2664857851 is a deficient number, since it is larger than the sum of its proper divisors (247149).

2664857851 is a wasteful number, since it uses less digits than its factorization.

2664857851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247148.

The product of its digits is 3225600, while the sum is 52.

The square root of 2664857851 is about 51622.2611961158. The cubic root of 2664857851 is about 1386.4089370985.

The spelling of 2664857851 in words is "two billion, six hundred sixty-four million, eight hundred fifty-seven thousand, eight hundred fifty-one".