2664766385 has 4 divisors (see below), whose sum is σ = 3197719668. Its totient is φ = 2131813104.

The previous prime is 2664766367. The next prime is 2664766399. The reversal of 2664766385 is 5836674662.

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

It can be written as a sum of positive squares in 2 ways, for example, as 384512881 + 2280253504 = 19609^2 + 47752^2 .

It is a cyclic number.

It is not a de Polignac number, because 2664766385 - 2¹⁰ = 2664765361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266476634 + ... + 266476643.

It is an arithmetic number, because the mean of its divisors is an integer number (799429917).

Almost surely, 2^2664766385 is an apocalyptic number.

It is an amenable number.

2664766385 is a deficient number, since it is larger than the sum of its proper divisors (532953283).

2664766385 is an equidigital number, since it uses as much as digits as its factorization.

2664766385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532953282.

The product of its digits is 8709120, while the sum is 53.

The square root of 2664766385 is about 51621.3752722649. The cubic root of 2664766385 is about 1386.3930749978.

The spelling of 2664766385 in words is "two billion, six hundred sixty-four million, seven hundred sixty-six thousand, three hundred eighty-five".