66072304 has 10 divisors (see below), whose sum is σ = 128015120. Its totient is φ = 33036144.

The previous prime is 66072289. The next prime is 66072311. The reversal of 66072304 is 40327066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064744 + ... + 2064775.

It is an arithmetic number, because the mean of its divisors is an integer number (12801512).

Almost surely, 2^66072304 is an apocalyptic number.

It is an amenable number.

66072304 is a deficient number, since it is larger than the sum of its proper divisors (61942816).

66072304 is a wasteful number, since it uses less digits than its factorization.

66072304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129527 (or 4129521 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 66072304 is about 8128.4871901234. The cubic root of 66072304 is about 404.2715228607.

It can be divided in two parts, 6607 and 2304, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 66072304 in words is "sixty-six million, seventy-two thousand, three hundred four".