66187473 has 8 divisors (see below), whose sum is σ = 96272736. Its totient is φ = 40113600.

The previous prime is 66187463. The next prime is 66187519. The reversal of 66187473 is 37478166.

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

It is not a de Polignac number, because 66187473 - 2⁸ = 66187217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66187403) 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, 1002808 + ... + 1002873.

It is an arithmetic number, because the mean of its divisors is an integer number (12034092).

Almost surely, 2^66187473 is an apocalyptic number.

It is an amenable number.

66187473 is a deficient number, since it is larger than the sum of its proper divisors (30085263).

66187473 is a wasteful number, since it uses less digits than its factorization.

66187473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005695.

The product of its digits is 169344, while the sum is 42.

The square root of 66187473 is about 8135.5683882566. The cubic root of 66187473 is about 404.5062784143.

The spelling of 66187473 in words is "sixty-six million, one hundred eighty-seven thousand, four hundred seventy-three".