66532093869 has 24 divisors (see below), whose sum is σ = 94033299360. Its totient is φ = 41836619232.

The previous prime is 66532093841. The next prime is 66532093879. The reversal of 66532093869 is 96839023566.

It is not a de Polignac number, because 66532093869 - 2¹⁶ = 66532028333 is a prime.

It is a super-2 number, since 2×66532093869² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66532093829) 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, 113874 + ... + 382140.

It is an arithmetic number, because the mean of its divisors is an integer number (3918054140).

Almost surely, 2^66532093869 is an apocalyptic number.

It is an amenable number.

66532093869 is a deficient number, since it is larger than the sum of its proper divisors (27501205491).

66532093869 is a wasteful number, since it uses less digits than its factorization.

66532093869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268537 (or 268518 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 57.

The spelling of 66532093869 in words is "sixty-six billion, five hundred thirty-two million, ninety-three thousand, eight hundred sixty-nine".