2661870587 has 2 divisors, whose sum is σ = 2661870588. Its totient is φ = 2661870586.

The previous prime is 2661870577. The next prime is 2661870619. The reversal of 2661870587 is 7850781662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2661870587 - 2⁸ = 2661870331 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661870577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330935293 + 1330935294.

It is an arithmetic number, because the mean of its divisors is an integer number (1330935294).

Almost surely, 2^2661870587 is an apocalyptic number.

2661870587 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661870587 is an equidigital number, since it uses as much as digits as its factorization.

2661870587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 2661870587 is about 51593.3192089829. The cubic root of 2661870587 is about 1385.8906958203.

The spelling of 2661870587 in words is "two billion, six hundred sixty-one million, eight hundred seventy thousand, five hundred eighty-seven".