66976123 has 4 divisors (see below), whose sum is σ = 67271400. Its totient is φ = 66680848.

The previous prime is 66976111. The next prime is 66976127. The reversal of 66976123 is 32167966.

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 66976123 - 2²¹ = 64878971 is a prime.

It is a super-2 number, since 2×66976123² = 8971602104222258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66976127) 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, 147298 + ... + 147751.

It is an arithmetic number, because the mean of its divisors is an integer number (16817850).

Almost surely, 2^66976123 is an apocalyptic number.

66976123 is a deficient number, since it is larger than the sum of its proper divisors (295277).

66976123 is a wasteful number, since it uses less digits than its factorization.

66976123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295276.

The product of its digits is 81648, while the sum is 40.

The square root of 66976123 is about 8183.8941219935. The cubic root of 66976123 is about 406.1065567578.

The spelling of 66976123 in words is "sixty-six million, nine hundred seventy-six thousand, one hundred twenty-three".