66963464743 has 18 divisors (see below), whose sum is σ = 78230202008. Its totient is φ = 56149042560.

The previous prime is 66963464723. The next prime is 66963464759. The reversal of 66963464743 is 34746436966.

It is not a de Polignac number, because 66963464743 - 2⁹ = 66963464231 is a prime.

It is a super-2 number, since 2×66963464743² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66963464723) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32177463 + ... + 32179543.

Almost surely, 2^66963464743 is an apocalyptic number.

66963464743 is a deficient number, since it is larger than the sum of its proper divisors (11266737265).

66963464743 is an frugal number, since it uses more digits than its factorization.

66963464743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263 (or 2135 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 58.

The spelling of 66963464743 in words is "sixty-six billion, nine hundred sixty-three million, four hundred sixty-four thousand, seven hundred forty-three".