66603304 has 16 divisors (see below), whose sum is σ = 126170100. Its totient is φ = 32957952.

The previous prime is 66603301. The next prime is 66603307. The reversal of 66603304 is 40330666.

It is an interprime number because it is at equal distance from previous prime (66603301) and next prime (66603307).

It can be written as a sum of positive squares in 2 ways, for example, as 59259204 + 7344100 = 7698^2 + 2710^2 .

It is not an unprimeable number, because it can be changed into a prime (66603301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42139 + ... + 43690.

Almost surely, 2^66603304 is an apocalyptic number.

It is an amenable number.

66603304 is a deficient number, since it is larger than the sum of its proper divisors (59566796).

66603304 is a wasteful number, since it uses less digits than its factorization.

66603304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85932 (or 85928 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 66603304 is about 8161.0847318233. The cubic root of 66603304 is about 405.3516308059.

The spelling of 66603304 in words is "sixty-six million, six hundred three thousand, three hundred four".