2664554657 has 2 divisors, whose sum is σ = 2664554658. Its totient is φ = 2664554656.

The previous prime is 2664554647. The next prime is 2664554671. The reversal of 2664554657 is 7564554662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1853216401 + 811338256 = 43049^2 + 28484^2 .

It is a cyclic number.

It is not a de Polignac number, because 2664554657 - 2²⁴ = 2647777441 is a prime.

It is not a weakly prime, because it can be changed into another prime (2664554647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332277328 + 1332277329.

It is an arithmetic number, because the mean of its divisors is an integer number (1332277329).

Almost surely, 2^2664554657 is an apocalyptic number.

It is an amenable number.

2664554657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664554657 is an equidigital number, since it uses as much as digits as its factorization.

2664554657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048000, while the sum is 50.

The square root of 2664554657 is about 51619.3244531542. The cubic root of 2664554657 is about 1386.3563555803.

The spelling of 2664554657 in words is "two billion, six hundred sixty-four million, five hundred fifty-four thousand, six hundred fifty-seven".