66860373 has 16 divisors (see below), whose sum is σ = 94136000. Its totient is φ = 42094080.

The previous prime is 66860359. The next prime is 66860377. The reversal of 66860373 is 37306866.

It is a happy number.

It is not a de Polignac number, because 66860373 - 2¹⁰ = 66859349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66860377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18213 + ... + 21573.

It is an arithmetic number, because the mean of its divisors is an integer number (5883500).

Almost surely, 2^66860373 is an apocalyptic number.

It is an amenable number.

66860373 is a deficient number, since it is larger than the sum of its proper divisors (27275627).

66860373 is a wasteful number, since it uses less digits than its factorization.

66860373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 66860373 is about 8176.8192471156. The cubic root of 66860373 is about 405.8724736380.

The spelling of 66860373 in words is "sixty-six million, eight hundred sixty thousand, three hundred seventy-three".