66664263753 has 12 divisors (see below), whose sum is σ = 96313283508. Its totient is φ = 44433400320.

The previous prime is 66664263739. The next prime is 66664263767. The reversal of 66664263753 is 35736246666.

It is an interprime number because it is at equal distance from previous prime (66664263739) and next prime (66664263767).

It can be written as a sum of positive squares in 2 ways, for example, as 50215431744 + 16448832009 = 224088^2 + 128253^2 .

It is not a de Polignac number, because 66664263753 - 2⁹ = 66664263241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66664263753.

It is not an unprimeable number, because it can be changed into a prime (66664263353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 742000 + ... + 826977.

It is an arithmetic number, because the mean of its divisors is an integer number (8026106959).

Almost surely, 2^66664263753 is an apocalyptic number.

It is an amenable number.

66664263753 is a deficient number, since it is larger than the sum of its proper divisors (29649019755).

66664263753 is a wasteful number, since it uses less digits than its factorization.

66664263753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573704 (or 1573701 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 54.

The spelling of 66664263753 in words is "sixty-six billion, six hundred sixty-four million, two hundred sixty-three thousand, seven hundred fifty-three".