66503339 has 12 divisors (see below), whose sum is σ = 79858368. Its totient is φ = 55162800.

The previous prime is 66503317. The next prime is 66503347. The reversal of 66503339 is 93330566.

It is not a de Polignac number, because 66503339 - 2²⁴ = 49726123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66503299 and 66503308.

It is not an unprimeable number, because it can be changed into a prime (66503309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20372 + ... + 23409.

It is an arithmetic number, because the mean of its divisors is an integer number (6654864).

Almost surely, 2^66503339 is an apocalyptic number.

66503339 is a deficient number, since it is larger than the sum of its proper divisors (13355029).

66503339 is a wasteful number, since it uses less digits than its factorization.

66503339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43826 (or 43819 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 35.

The square root of 66503339 is about 8154.9579398057. The cubic root of 66503339 is about 405.1487316356.

The spelling of 66503339 in words is "sixty-six million, five hundred three thousand, three hundred thirty-nine".