2665420851 has 8 divisors (see below), whose sum is σ = 3554655120. Its totient is φ = 1776566912.

The previous prime is 2665420843. The next prime is 2665420907. The reversal of 2665420851 is 1580245662.

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 2665420851 - 2³ = 2665420843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2665420811) 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, 78306 + ... + 107063.

It is an arithmetic number, because the mean of its divisors is an integer number (444331890).

Almost surely, 2^2665420851 is an apocalyptic number.

2665420851 is a deficient number, since it is larger than the sum of its proper divisors (889234269).

2665420851 is a wasteful number, since it uses less digits than its factorization.

2665420851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190165.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 2665420851 is about 51627.7139819303. The cubic root of 2665420851 is about 1386.5065649787.

The spelling of 2665420851 in words is "two billion, six hundred sixty-five million, four hundred twenty thousand, eight hundred fifty-one".