2507661671 has 2 divisors, whose sum is σ = 2507661672. Its totient is φ = 2507661670.

The previous prime is 2507661647. The next prime is 2507661691. The reversal of 2507661671 is 1761667052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2507661671 - 2²² = 2503467367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2507661631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253830835 + 1253830836.

It is an arithmetic number, because the mean of its divisors is an integer number (1253830836).

Almost surely, 2^2507661671 is an apocalyptic number.

2507661671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2507661671 is an equidigital number, since it uses as much as digits as its factorization.

2507661671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 2507661671 is about 50076.5580985754. The cubic root of 2507661671 is about 1358.5938593345.

The spelling of 2507661671 in words is "two billion, five hundred seven million, six hundred sixty-one thousand, six hundred seventy-one".