66373863 has 16 divisors (see below), whose sum is σ = 90220800. Its totient is φ = 43395264.

The previous prime is 66373849. The next prime is 66373889. The reversal of 66373863 is 36837366.

It is not a de Polignac number, because 66373863 - 2⁴ = 66373847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66373843) 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, 42820 + ... + 44342.

It is an arithmetic number, because the mean of its divisors is an integer number (5638800).

Almost surely, 2^66373863 is an apocalyptic number.

66373863 is a deficient number, since it is larger than the sum of its proper divisors (23846937).

66373863 is a wasteful number, since it uses less digits than its factorization.

66373863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798.

The product of its digits is 326592, while the sum is 42.

The square root of 66373863 is about 8147.0155885453. The cubic root of 66373863 is about 404.8856314771.

The spelling of 66373863 in words is "sixty-six million, three hundred seventy-three thousand, eight hundred sixty-three".