66703673749 has 24 divisors (see below), whose sum is σ = 73354053600. Its totient is φ = 60416223840.

The previous prime is 66703673731. The next prime is 66703673753. The reversal of 66703673749 is 94737630766.

It is not a de Polignac number, because 66703673749 - 2²¹ = 66701576597 is a prime.

It is a super-2 number, since 2×66703673749² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66703673693 and 66703673702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66703673249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5839854 + ... + 5851264.

It is an arithmetic number, because the mean of its divisors is an integer number (3056418900).

Almost surely, 2^66703673749 is an apocalyptic number.

It is an amenable number.

66703673749 is a deficient number, since it is larger than the sum of its proper divisors (6650379851).

66703673749 is a wasteful number, since it uses less digits than its factorization.

66703673749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11665 (or 11562 counting only the distinct ones).

The product of its (nonzero) digits is 24004512, while the sum is 58.

The spelling of 66703673749 in words is "sixty-six billion, seven hundred three million, six hundred seventy-three thousand, seven hundred forty-nine".