66663304 has 8 divisors (see below), whose sum is σ = 124993710. Its totient is φ = 33331648.

The previous prime is 66663283. The next prime is 66663353. The reversal of 66663304 is 40336666.

It can be written as a sum of positive squares in only one way, i.e., 62378404 + 4284900 = 7898^2 + 2070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×66663304² = 8887992200392832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66663304.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4166449 + ... + 4166464.

Almost surely, 2^66663304 is an apocalyptic number.

It is an amenable number.

66663304 is a deficient number, since it is larger than the sum of its proper divisors (58330406).

66663304 is a wasteful number, since it uses less digits than its factorization.

66663304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8332919 (or 8332915 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 66663304 is about 8164.7598862428. The cubic root of 66663304 is about 405.4733154510.

The spelling of 66663304 in words is "sixty-six million, six hundred sixty-three thousand, three hundred four".