66873603 has 8 divisors (see below), whose sum is σ = 92041216. Its totient is φ = 43144200.

The previous prime is 66873601. The next prime is 66873619. The reversal of 66873603 is 30637866.

It is a happy number.

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

It is not a de Polignac number, because 66873603 - 2¹ = 66873601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66873601) 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, 359443 + ... + 359628.

It is an arithmetic number, because the mean of its divisors is an integer number (11505152).

Almost surely, 2^66873603 is an apocalyptic number.

66873603 is a deficient number, since it is larger than the sum of its proper divisors (25167613).

66873603 is a wasteful number, since it uses less digits than its factorization.

66873603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719105.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 66873603 is about 8177.6282013797. The cubic root of 66873603 is about 405.8992425518.

It can be divided in two parts, 66873 and 603, that added together give a palindrome (67476).

The spelling of 66873603 in words is "sixty-six million, eight hundred seventy-three thousand, six hundred three".