66423031 has 8 divisors (see below), whose sum is σ = 69998720. Its totient is φ = 62855352.

The previous prime is 66423023. The next prime is 66423041. The reversal of 66423031 is 13032466.

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 66423031 - 2³ = 66423023 is a prime.

It is a super-2 number, since 2×66423031² = 8824038094453922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66422987 and 66423005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66423001) 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, 23416 + ... + 26098.

It is an arithmetic number, because the mean of its divisors is an integer number (8749840).

Almost surely, 2^66423031 is an apocalyptic number.

66423031 is a deficient number, since it is larger than the sum of its proper divisors (3575689).

66423031 is a wasteful number, since it uses less digits than its factorization.

66423031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 66423031 is about 8150.0325766220. The cubic root of 66423031 is about 404.9855829852.

Adding to 66423031 its reverse (13032466), we get a palindrome (79455497).

The spelling of 66423031 in words is "sixty-six million, four hundred twenty-three thousand, thirty-one".