66310431 has 8 divisors (see below), whose sum is σ = 96451584. Its totient is φ = 40188120.

The previous prime is 66310423. The next prime is 66310459. The reversal of 66310431 is 13401366.

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

It is not a de Polignac number, because 66310431 - 2³ = 66310423 is a prime.

It is a super-2 number, since 2×66310431² = 8794146518811522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66310411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004671 + ... + 1004736.

It is an arithmetic number, because the mean of its divisors is an integer number (12056448).

Almost surely, 2^66310431 is an apocalyptic number.

66310431 is a deficient number, since it is larger than the sum of its proper divisors (30141153).

66310431 is a wasteful number, since it uses less digits than its factorization.

66310431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009421.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 66310431 is about 8143.1216987099. The cubic root of 66310431 is about 404.7566103533.

Adding to 66310431 its reverse (13401366), we get a palindrome (79711797).

The spelling of 66310431 in words is "sixty-six million, three hundred ten thousand, four hundred thirty-one".