66064403 has 8 divisors (see below), whose sum is σ = 67818576. Its totient is φ = 64332000.

The previous prime is 66064393. The next prime is 66064421. The reversal of 66064403 is 30446066.

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 66064403 - 2¹⁰ = 66063379 is a prime.

It is a Duffinian number.

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, 800 + ... + 11522.

It is an arithmetic number, because the mean of its divisors is an integer number (8477322).

Almost surely, 2^66064403 is an apocalyptic number.

66064403 is a deficient number, since it is larger than the sum of its proper divisors (1754173).

66064403 is a wasteful number, since it uses less digits than its factorization.

66064403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10885.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 66064403 is about 8128.0011687991. The cubic root of 66064403 is about 404.2554078047.

The spelling of 66064403 in words is "sixty-six million, sixty-four thousand, four hundred three".