2661372417 has 16 divisors (see below), whose sum is σ = 3891363840. Its totient is φ = 1604504400.

The previous prime is 2661372391. The next prime is 2661372479. The reversal of 2661372417 is 7142731662.

It is not a de Polignac number, because 2661372417 - 2⁶ = 2661372353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661372487) 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, 204817 + ... + 217422.

It is an arithmetic number, because the mean of its divisors is an integer number (243210240).

Almost surely, 2^2661372417 is an apocalyptic number.

It is an amenable number.

2661372417 is a deficient number, since it is larger than the sum of its proper divisors (1229991423).

2661372417 is a wasteful number, since it uses less digits than its factorization.

2661372417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422444.

The product of its digits is 84672, while the sum is 39.

The square root of 2661372417 is about 51588.4911293207. The cubic root of 2661372417 is about 1385.8042337854.

The spelling of 2661372417 in words is "two billion, six hundred sixty-one million, three hundred seventy-two thousand, four hundred seventeen".