2661506206 has 16 divisors (see below), whose sum is σ = 4210444800. Its totient is φ = 1258293528.

The previous prime is 2661506201. The next prime is 2661506207. The reversal of 2661506206 is 6026051662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661506201) 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, 47086 + ... + 86833.

It is an arithmetic number, because the mean of its divisors is an integer number (263152800).

Almost surely, 2^2661506206 is an apocalyptic number.

2661506206 is a deficient number, since it is larger than the sum of its proper divisors (1548938594).

2661506206 is a wasteful number, since it uses less digits than its factorization.

2661506206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134463.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 2661506206 is about 51589.7878072783. The cubic root of 2661506206 is about 1385.8274551698.

Adding to 2661506206 its reverse (6026051662), we get a palindrome (8687557868).

The spelling of 2661506206 in words is "two billion, six hundred sixty-one million, five hundred six thousand, two hundred six".