2661572667 has 16 divisors (see below), whose sum is σ = 3822835968. Its totient is φ = 1637423520.

The previous prime is 2661572653. The next prime is 2661572671. The reversal of 2661572667 is 7662751662.

It is not a de Polignac number, because 2661572667 - 2¹² = 2661568571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661572867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171292 + ... + 186182.

It is an arithmetic number, because the mean of its divisors is an integer number (238927248).

Almost surely, 2^2661572667 is an apocalyptic number.

2661572667 is a deficient number, since it is larger than the sum of its proper divisors (1161263301).

2661572667 is a wasteful number, since it uses less digits than its factorization.

2661572667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19490.

The product of its digits is 1270080, while the sum is 48.

The square root of 2661572667 is about 51590.4319326753. The cubic root of 2661572667 is about 1385.8389903314.

The spelling of 2661572667 in words is "two billion, six hundred sixty-one million, five hundred seventy-two thousand, six hundred sixty-seven".