2661870505 has 16 divisors (see below), whose sum is σ = 3651709824. Its totient is φ = 1824710400.

The previous prime is 2661870503. The next prime is 2661870553. The reversal of 2661870505 is 5050781662.

It is not a de Polignac number, because 2661870505 - 2¹ = 2661870503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661870503) 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, 122730 + ... + 142780.

It is an arithmetic number, because the mean of its divisors is an integer number (228231864).

Almost surely, 2^2661870505 is an apocalyptic number.

It is an amenable number.

2661870505 is a deficient number, since it is larger than the sum of its proper divisors (989839319).

2661870505 is a wasteful number, since it uses less digits than its factorization.

2661870505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23856.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 2661870505 is about 51593.3184143063. The cubic root of 2661870505 is about 1385.8906815893.

The spelling of 2661870505 in words is "two billion, six hundred sixty-one million, eight hundred seventy thousand, five hundred five".