66284073 has 24 divisors (see below), whose sum is σ = 97696872. Its totient is φ = 43296768.

The previous prime is 66284059. The next prime is 66284083. The reversal of 66284073 is 37048266.

It can be written as a sum of positive squares in 4 ways, for example, as 138384 + 66145689 = 372^2 + 8133^2 .

It is not a de Polignac number, because 66284073 - 2⁵ = 66284041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66284033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152865 + ... + 153297.

It is an arithmetic number, because the mean of its divisors is an integer number (4070703).

Almost surely, 2^66284073 is an apocalyptic number.

It is an amenable number.

66284073 is a deficient number, since it is larger than the sum of its proper divisors (31412799).

66284073 is a wasteful number, since it uses less digits than its factorization.

66284073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 66284073 is about 8141.5031167469. The cubic root of 66284073 is about 404.7029738015.

It can be divided in two parts, 6628 and 4073, that added together give a palindrome (10701).

The spelling of 66284073 in words is "sixty-six million, two hundred eighty-four thousand, seventy-three".