66967873 has 8 divisors (see below), whose sum is σ = 79174080. Its totient is φ = 55421520.

The previous prime is 66967871. The next prime is 66967889. The reversal of 66967873 is 37876966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66967873 - 2¹ = 66967871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66967873.

It is not an unprimeable number, because it can be changed into a prime (66967871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164743 + ... + 165148.

It is an arithmetic number, because the mean of its divisors is an integer number (9896760).

Almost surely, 2^66967873 is an apocalyptic number.

It is an amenable number.

66967873 is a deficient number, since it is larger than the sum of its proper divisors (12206207).

66967873 is a wasteful number, since it uses less digits than its factorization.

66967873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329927.

The product of its digits is 2286144, while the sum is 52.

The square root of 66967873 is about 8183.3900676920. The cubic root of 66967873 is about 406.0898815781.

The spelling of 66967873 in words is "sixty-six million, nine hundred sixty-seven thousand, eight hundred seventy-three".