66524473 has 2 divisors, whose sum is σ = 66524474. Its totient is φ = 66524472.

The previous prime is 66524467. The next prime is 66524503. The reversal of 66524473 is 37442566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62536464 + 3988009 = 7908^2 + 1997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66524473 is a prime.

It is not a weakly prime, because it can be changed into another prime (66524413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33262236 + 33262237.

It is an arithmetic number, because the mean of its divisors is an integer number (33262237).

Almost surely, 2^66524473 is an apocalyptic number.

It is an amenable number.

66524473 is a deficient number, since it is larger than the sum of its proper divisors (1).

66524473 is an equidigital number, since it uses as much as digits as its factorization.

66524473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 37.

The square root of 66524473 is about 8156.2536130260. The cubic root of 66524473 is about 405.1916443002.

The spelling of 66524473 in words is "sixty-six million, five hundred twenty-four thousand, four hundred seventy-three".