2656671091 has 2 divisors, whose sum is σ = 2656671092. Its totient is φ = 2656671090.

The previous prime is 2656671079. The next prime is 2656671109. The reversal of 2656671091 is 1901766562.

Together with next prime (2656671109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2656671091 - 2¹⁹ = 2656146803 is a prime.

It is not a weakly prime, because it can be changed into another prime (2656671041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328335545 + 1328335546.

It is an arithmetic number, because the mean of its divisors is an integer number (1328335546).

Almost surely, 2^2656671091 is an apocalyptic number.

2656671091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656671091 is an equidigital number, since it uses as much as digits as its factorization.

2656671091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 2656671091 is about 51542.9053410845. The cubic root of 2656671091 is about 1384.9877430742.

The spelling of 2656671091 in words is "two billion, six hundred fifty-six million, six hundred seventy-one thousand, ninety-one".