66965333589 has 108 divisors (see below), whose sum is σ = 129058701408. Its totient is φ = 33274090080.

The previous prime is 66965333563. The next prime is 66965333621. The reversal of 66965333589 is 98533356966.

66965333589 is a `hidden beast` number, since 6 + 6 + 96 + 533 + 3 + 5 + 8 + 9 = 666.

It is not a de Polignac number, because 66965333589 - 2¹⁶ = 66965268053 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66965333089) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1200022 + ... + 1254584.

It is an arithmetic number, because the mean of its divisors is an integer number (1194987976).

Almost surely, 2^66965333589 is an apocalyptic number.

66965333589 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

66965333589 is a deficient number, since it is larger than the sum of its proper divisors (62093367819).

66965333589 is a wasteful number, since it uses less digits than its factorization.

66965333589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54628 (or 54607 counting only the distinct ones).

The product of its digits is 94478400, while the sum is 63.

The spelling of 66965333589 in words is "sixty-six billion, nine hundred sixty-five million, three hundred thirty-three thousand, five hundred eighty-nine".