2640246066 has 12 divisors (see below), whose sum is σ = 5720533182. Its totient is φ = 880082016.

The previous prime is 2640246001. The next prime is 2640246097. The reversal of 2640246066 is 6606420462.

2640246066 is a `hidden beast` number, since 2 + 6 + 40 + 2 + 4 + 606 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1929757041 + 710489025 = 43929^2 + 26655^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2640246066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73340151 + ... + 73340186.

Almost surely, 2^2640246066 is an apocalyptic number.

2640246066 is an abundant number, since it is smaller than the sum of its proper divisors (3080287116).

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

2640246066 is a wasteful number, since it uses less digits than its factorization.

2640246066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146680345 (or 146680342 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 2640246066 is about 51383.3247853815. The cubic root of 2640246066 is about 1382.1275845723.

The spelling of 2640246066 in words is "two billion, six hundred forty million, two hundred forty-six thousand, sixty-six".