2664578915 has 4 divisors (see below), whose sum is σ = 3197494704. Its totient is φ = 2131663128.

The previous prime is 2664578909. The next prime is 2664578933. The reversal of 2664578915 is 5198754662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5198754662 = 2 ⋅2599377331.

It is a cyclic number.

It is not a de Polignac number, because 2664578915 - 2¹² = 2664574819 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266457887 + ... + 266457896.

It is an arithmetic number, because the mean of its divisors is an integer number (799373676).

Almost surely, 2^2664578915 is an apocalyptic number.

2664578915 is a deficient number, since it is larger than the sum of its proper divisors (532915789).

2664578915 is an equidigital number, since it uses as much as digits as its factorization.

2664578915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532915788.

The product of its digits is 3628800, while the sum is 53.

The square root of 2664578915 is about 51619.5594227614. The cubic root of 2664578915 is about 1386.3605626787.

The spelling of 2664578915 in words is "two billion, six hundred sixty-four million, five hundred seventy-eight thousand, nine hundred fifteen".