66876403 has 4 divisors (see below), whose sum is σ = 72956088. Its totient is φ = 60796720.

The previous prime is 66876401. The next prime is 66876421. The reversal of 66876403 is 30467866.

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 66876403 - 2¹ = 66876401 is a prime.

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 a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (66876401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3039826 + ... + 3039847.

It is an arithmetic number, because the mean of its divisors is an integer number (18239022).

Almost surely, 2^66876403 is an apocalyptic number.

66876403 is a deficient number, since it is larger than the sum of its proper divisors (6079685).

66876403 is a wasteful number, since it uses less digits than its factorization.

66876403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079684.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 66876403 is about 8177.7993983712. The cubic root of 66876403 is about 405.9049074777.

The spelling of 66876403 in words is "sixty-six million, eight hundred seventy-six thousand, four hundred three".