2656672766551 has 2 divisors, whose sum is σ = 2656672766552. Its totient is φ = 2656672766550.

The previous prime is 2656672766533. The next prime is 2656672766581. The reversal of 2656672766551 is 1556672766562.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2656672766551 - 2⁹ = 2656672766039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656672766581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328336383275 + 1328336383276.

It is an arithmetic number, because the mean of its divisors is an integer number (1328336383276).

Almost surely, 2^{2656672766551} is an apocalyptic number.

2656672766551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656672766551 is an equidigital number, since it uses as much as digits as its factorization.

2656672766551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512000, while the sum is 64.

The spelling of 2656672766551 in words is "two trillion, six hundred fifty-six billion, six hundred seventy-two million, seven hundred sixty-six thousand, five hundred fifty-one".