66064433 has 8 divisors (see below), whose sum is σ = 67408200. Its totient is φ = 64734208.

The previous prime is 66064429. The next prime is 66064451. The reversal of 66064433 is 33446066.

It can be written as a sum of positive squares in 4 ways, for example, as 1149184 + 64915249 = 1072^2 + 8057^2 .

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 66064433 - 2² = 66064429 is a prime.

It is a super-2 number, since 2×66064433² = 8729018615222978, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66064433.

It is not an unprimeable number, because it can be changed into a prime (66064423) 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, 6773 + ... + 13341.

It is an arithmetic number, because the mean of its divisors is an integer number (8426025).

Almost surely, 2^66064433 is an apocalyptic number.

It is an amenable number.

66064433 is a deficient number, since it is larger than the sum of its proper divisors (1343767).

66064433 is a wasteful number, since it uses less digits than its factorization.

66064433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 66064433 is about 8128.0030142711. The cubic root of 66064433 is about 404.2554689958.

The spelling of 66064433 in words is "sixty-six million, sixty-four thousand, four hundred thirty-three".