2620066666 has 32 divisors (see below), whose sum is σ = 4692971520. Its totient is φ = 1072656816.

The previous prime is 2620066661. The next prime is 2620066667. The reversal of 2620066666 is 6666600262.

2620066666 is a modest number, since divided by 66666 gives 26200 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2620066661) 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, 261375 + ... + 271213.

It is an arithmetic number, because the mean of its divisors is an integer number (146655360).

Almost surely, 2^2620066666 is an apocalyptic number.

2620066666 is a deficient number, since it is larger than the sum of its proper divisors (2072904854).

2620066666 is a wasteful number, since it uses less digits than its factorization.

2620066666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 2620066666 is about 51186.5867781785. The cubic root of 2620066666 is about 1378.5973751845.

The spelling of 2620066666 in words is "two billion, six hundred twenty million, sixty-six thousand, six hundred sixty-six".