2661870506 has 16 divisors (see below), whose sum is σ = 4228822080. Its totient is φ = 1252305600.

The previous prime is 2661870503. The next prime is 2661870553. The reversal of 2661870506 is 6050781662.

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 7 ways as a sum of consecutive naturals, for example, 153581 + ... + 170031.

It is an arithmetic number, because the mean of its divisors is an integer number (264301380).

Almost surely, 2^2661870506 is an apocalyptic number.

2661870506 is a deficient number, since it is larger than the sum of its proper divisors (1566951574).

2661870506 is a wasteful number, since it uses less digits than its factorization.

2661870506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21229.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 2661870506 is about 51593.3184239975. The cubic root of 2661870506 is about 1385.8906817629.

The spelling of 2661870506 in words is "two billion, six hundred sixty-one million, eight hundred seventy thousand, five hundred six".