2006556651660 has 96 divisors (see below), whose sum is σ = 6213079176192. Its totient is φ = 479774430720.

The previous prime is 2006556651653. The next prime is 2006556651667. The reversal of 2006556651660 is 661566556002.

It is an interprime number because it is at equal distance from previous prime (2006556651653) and next prime (2006556651667).

It is not an unprimeable number, because it can be changed into a prime (2006556651667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20775364 + ... + 20871723.

It is an arithmetic number, because the mean of its divisors is an integer number (64719574752).

Almost surely, 2^{2006556651660} is an apocalyptic number.

2006556651660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2006556651660 is an abundant number, since it is smaller than the sum of its proper divisors (4206522524532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2006556651660 is a wasteful number, since it uses less digits than its factorization.

2006556651660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41647183 (or 41647181 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 2006556651660 in words is "two trillion, six billion, five hundred fifty-six million, six hundred fifty-one thousand, six hundred sixty".