66472855 has 8 divisors (see below), whose sum is σ = 79927200. Its totient is φ = 53071776.

The previous prime is 66472853. The next prime is 66472877. The reversal of 66472855 is 55827466.

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

It is a cyclic number.

It is not a de Polignac number, because 66472855 - 2¹ = 66472853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66472853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10515 + ... + 15604.

It is an arithmetic number, because the mean of its divisors is an integer number (9990900).

Almost surely, 2^66472855 is an apocalyptic number.

66472855 is a deficient number, since it is larger than the sum of its proper divisors (13454345).

66472855 is a wasteful number, since it uses less digits than its factorization.

66472855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26633.

The product of its digits is 403200, while the sum is 43.

The square root of 66472855 is about 8153.0886785316. The cubic root of 66472855 is about 405.0868177442.

The spelling of 66472855 in words is "sixty-six million, four hundred seventy-two thousand, eight hundred fifty-five".