66831073 has 8 divisors (see below), whose sum is σ = 68641056. Its totient is φ = 65032800.

The previous prime is 66831053. The next prime is 66831143. The reversal of 66831073 is 37013866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66831073 - 2¹⁷ = 66700001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66831013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9318 + ... + 14848.

It is an arithmetic number, because the mean of its divisors is an integer number (8580132).

Almost surely, 2^66831073 is an apocalyptic number.

It is an amenable number.

66831073 is a deficient number, since it is larger than the sum of its proper divisors (1809983).

66831073 is a wasteful number, since it uses less digits than its factorization.

66831073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5855.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 66831073 is about 8175.0274005657. The cubic root of 66831073 is about 405.8131769250.

The spelling of 66831073 in words is "sixty-six million, eight hundred thirty-one thousand, seventy-three".