66031973 has 8 divisors (see below), whose sum is σ = 79437120. Its totient is φ = 53619840.

The previous prime is 66031969. The next prime is 66031997. The reversal of 66031973 is 37913066.

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 66031973 - 2² = 66031969 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66031943) 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, 248108 + ... + 248373.

It is an arithmetic number, because the mean of its divisors is an integer number (9929640).

Almost surely, 2^66031973 is an apocalyptic number.

It is an amenable number.

66031973 is a deficient number, since it is larger than the sum of its proper divisors (13405147).

66031973 is a wasteful number, since it uses less digits than its factorization.

66031973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496507.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 66031973 is about 8126.0059684940. The cubic root of 66031973 is about 404.1892493894.

The spelling of 66031973 in words is "sixty-six million, thirty-one thousand, nine hundred seventy-three".