66104031 has 16 divisors (see below), whose sum is σ = 101657600. Its totient is φ = 37425888.

The previous prime is 66104011. The next prime is 66104033. The reversal of 66104031 is 13040166.

It is not a de Polignac number, because 66104031 - 2⁷ = 66103903 is a prime.

It is a super-2 number, since 2×66104031² = 8739485828897922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66103989 and 66104007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66104033) 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 15 ways as a sum of consecutive naturals, for example, 12151 + ... + 16728.

It is an arithmetic number, because the mean of its divisors is an integer number (6353600).

Almost surely, 2^66104031 is an apocalyptic number.

66104031 is a deficient number, since it is larger than the sum of its proper divisors (35553569).

66104031 is a wasteful number, since it uses less digits than its factorization.

66104031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28998.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 66104031 is about 8130.4385490575. The cubic root of 66104031 is about 404.3362210240.

Adding to 66104031 its reverse (13040166), we get a palindrome (79144197).

The spelling of 66104031 in words is "sixty-six million, one hundred four thousand, thirty-one".