66763939464 has 48 divisors (see below), whose sum is σ = 181818038220. Its totient is φ = 22131688320.

The previous prime is 66763939433. The next prime is 66763939493. The reversal of 66763939464 is 46493936766.

It can be written as a sum of positive squares in 2 ways, for example, as 54635322564 + 12128616900 = 233742^2 + 110130^2 .

It is a super-2 number, since 2×66763939464² (a number of 22 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 2548507 + ... + 2574570.

Almost surely, 2^66763939464 is an apocalyptic number.

It is an amenable number.

66763939464 is an abundant number, since it is smaller than the sum of its proper divisors (115054098756).

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

66763939464 is a wasteful number, since it uses less digits than its factorization.

66763939464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123270 (or 5123263 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 63.

The spelling of 66763939464 in words is "sixty-six billion, seven hundred sixty-three million, nine hundred thirty-nine thousand, four hundred sixty-four".