66883265757 has 128 divisors (see below), whose sum is σ = 125509386240. Its totient is φ = 34193016000.

The previous prime is 66883265749. The next prime is 66883265773. The reversal of 66883265757 is 75756238866.

It is a happy number.

It is not a de Polignac number, because 66883265757 - 2³ = 66883265749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 66883265694 and 66883265703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66883263757) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 57115782 + ... + 57116952.

It is an arithmetic number, because the mean of its divisors is an integer number (980542080).

Almost surely, 2^66883265757 is an apocalyptic number.

It is an amenable number.

66883265757 is a deficient number, since it is larger than the sum of its proper divisors (58626120483).

66883265757 is a wasteful number, since it uses less digits than its factorization.

66883265757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612 (or 1606 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 63.

The spelling of 66883265757 in words is "sixty-six billion, eight hundred eighty-three million, two hundred sixty-five thousand, seven hundred fifty-seven".