66573323 has 4 divisors (see below), whose sum is σ = 68372640. Its totient is φ = 64774008.

The previous prime is 66573313. The next prime is 66573361. The reversal of 66573323 is 32337566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66573323 - 2¹⁶ = 66507787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66573313) 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, 899603 + ... + 899676.

It is an arithmetic number, because the mean of its divisors is an integer number (17093160).

Almost surely, 2^66573323 is an apocalyptic number.

66573323 is a deficient number, since it is larger than the sum of its proper divisors (1799317).

66573323 is a wasteful number, since it uses less digits than its factorization.

66573323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799316.

The product of its digits is 68040, while the sum is 35.

The square root of 66573323 is about 8159.2476981643. The cubic root of 66573323 is about 405.2907996335.

The spelling of 66573323 in words is "sixty-six million, five hundred seventy-three thousand, three hundred twenty-three".