66003388 has 24 divisors (see below), whose sum is σ = 127738800. Its totient is φ = 29589120.

The previous prime is 66003373. The next prime is 66003389. The reversal of 66003388 is 88330066.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66003389) 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, 7063 + ... + 13486.

It is an arithmetic number, because the mean of its divisors is an integer number (5322450).

Almost surely, 2^66003388 is an apocalyptic number.

It is an amenable number.

66003388 is a deficient number, since it is larger than the sum of its proper divisors (61735412).

66003388 is a wasteful number, since it uses less digits than its factorization.

66003388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20637 (or 20635 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 66003388 is about 8124.2469189458. The cubic root of 66003388 is about 404.1309169546.

The spelling of 66003388 in words is "sixty-six million, three thousand, three hundred eighty-eight".