2664656523551 has 8 divisors (see below), whose sum is σ = 2906909958864. Its totient is φ = 2422405077120.

The previous prime is 2664656523493. The next prime is 2664656523601. The reversal of 2664656523551 is 1553256564662.

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 2664656523551 - 2²⁶ = 2664589414687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2664656543551) 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, 4409111 + ... + 4976903.

It is an arithmetic number, because the mean of its divisors is an integer number (363363744858).

Almost surely, 2^{2664656523551} is an apocalyptic number.

2664656523551 is a deficient number, since it is larger than the sum of its proper divisors (242253435313).

2664656523551 is a wasteful number, since it uses less digits than its factorization.

2664656523551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994441.

The product of its digits is 38880000, while the sum is 56.

The spelling of 2664656523551 in words is "two trillion, six hundred sixty-four billion, six hundred fifty-six million, five hundred twenty-three thousand, five hundred fifty-one".