66325473 has 20 divisors (see below), whose sum is σ = 99316800. Its totient is φ = 44110872.

The previous prime is 66325471. The next prime is 66325487. The reversal of 66325473 is 37452366.

It is not a de Polignac number, because 66325473 - 2¹ = 66325471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66325471) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47836 + ... + 49202.

It is an arithmetic number, because the mean of its divisors is an integer number (4965840).

Almost surely, 2^66325473 is an apocalyptic number.

It is an amenable number.

66325473 is a deficient number, since it is larger than the sum of its proper divisors (32991327).

66325473 is a wasteful number, since it uses less digits than its factorization.

66325473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978 (or 1969 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 66325473 is about 8144.0452479097. The cubic root of 66325473 is about 404.7872133245.

The spelling of 66325473 in words is "sixty-six million, three hundred twenty-five thousand, four hundred seventy-three".