66912883 has 4 divisors (see below), whose sum is σ = 67015080. Its totient is φ = 66810688.

The previous prime is 66912877. The next prime is 66912887. The reversal of 66912883 is 38821966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66912883 - 2²¹ = 64815731 is a prime.

It is a super-2 number, since 2×66912883² = 8954667822743378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66912887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50110 + ... + 51427.

It is an arithmetic number, because the mean of its divisors is an integer number (16753770).

Almost surely, 2^66912883 is an apocalyptic number.

66912883 is a deficient number, since it is larger than the sum of its proper divisors (102197).

66912883 is a wasteful number, since it uses less digits than its factorization.

66912883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102196.

The product of its digits is 124416, while the sum is 43.

The square root of 66912883 is about 8180.0295231741. The cubic root of 66912883 is about 405.9786989237.

The spelling of 66912883 in words is "sixty-six million, nine hundred twelve thousand, eight hundred eighty-three".