66723398 has 24 divisors (see below), whose sum is σ = 117167832. Its totient is φ = 28413504.

The previous prime is 66723379. The next prime is 66723407. The reversal of 66723398 is 89332766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13886 + ... + 18062.

It is an arithmetic number, because the mean of its divisors is an integer number (4881993).

Almost surely, 2^66723398 is an apocalyptic number.

66723398 is a deficient number, since it is larger than the sum of its proper divisors (50444434).

66723398 is a wasteful number, since it uses less digits than its factorization.

66723398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356 (or 4349 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 66723398 is about 8168.4391409865. The cubic root of 66723398 is about 405.5951175712.

The spelling of 66723398 in words is "sixty-six million, seven hundred twenty-three thousand, three hundred ninety-eight".