2661572867 has 2 divisors, whose sum is σ = 2661572868. Its totient is φ = 2661572866.

The previous prime is 2661572863. The next prime is 2661572873. The reversal of 2661572867 is 7682751662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2661572867 - 2² = 2661572863 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661572863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330786433 + 1330786434.

It is an arithmetic number, because the mean of its divisors is an integer number (1330786434).

Almost surely, 2^2661572867 is an apocalyptic number.

2661572867 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661572867 is an equidigital number, since it uses as much as digits as its factorization.

2661572867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The square root of 2661572867 is about 51590.4338710192. The cubic root of 2661572867 is about 1385.8390250436.

The spelling of 2661572867 in words is "two billion, six hundred sixty-one million, five hundred seventy-two thousand, eight hundred sixty-seven".