66737673783 has 36 divisors (see below), whose sum is σ = 106236399360. Its totient is φ = 40341216960.

The previous prime is 66737673773. The next prime is 66737673811. The reversal of 66737673783 is 38737673766.

66737673783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66737673783 - 2⁹ = 66737673271 is a prime.

It is a super-2 number, since 2×66737673783² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66737673783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66737673773) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 337083 + ... + 497091.

Almost surely, 2^66737673783 is an apocalyptic number.

66737673783 is a deficient number, since it is larger than the sum of its proper divisors (39498725577).

66737673783 is a wasteful number, since it uses less digits than its factorization.

66737673783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160420 (or 160406 counting only the distinct ones).

The product of its digits is 112021056, while the sum is 63.

The spelling of 66737673783 in words is "sixty-six billion, seven hundred thirty-seven million, six hundred seventy-three thousand, seven hundred eighty-three".