6660263345 has 12 divisors (see below), whose sum is σ = 8125076316. Its totient is φ = 5239741440.

The previous prime is 6660263333. The next prime is 6660263347. The reversal of 6660263345 is 5433620666.

It can be written as a sum of positive squares in 6 ways, for example, as 282004849 + 6378258496 = 16793^2 + 79864^2 .

It is not a de Polignac number, because 6660263345 - 2²⁶ = 6593154481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6660263347) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1422929 + ... + 1427601.

It is an arithmetic number, because the mean of its divisors is an integer number (677089693).

Almost surely, 2^6660263345 is an apocalyptic number.

It is an amenable number.

6660263345 is a deficient number, since it is larger than the sum of its proper divisors (1464812971).

6660263345 is an frugal number, since it uses more digits than its factorization.

6660263345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412 (or 4739 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 41.

The square root of 6660263345 is about 81610.4364955855. The cubic root of 6660263345 is about 1881.4692890955.

The spelling of 6660263345 in words is "six billion, six hundred sixty million, two hundred sixty-three thousand, three hundred forty-five".