66031031 has 6 divisors (see below), whose sum is σ = 72579696. Its totient is φ = 60028100.

The previous prime is 66031013. The next prime is 66031037. The reversal of 66031031 is 13013066.

It is not a de Polignac number, because 66031031 - 2¹⁰ = 66030007 is a prime.

It is a super-2 number, since 2×66031031² = 8720194109845922, 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 = 66030994 and 66031012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66031037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272735 + ... + 272976.

It is an arithmetic number, because the mean of its divisors is an integer number (12096616).

Almost surely, 2^66031031 is an apocalyptic number.

66031031 is a deficient number, since it is larger than the sum of its proper divisors (6548665).

66031031 is a wasteful number, since it uses less digits than its factorization.

66031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545733 (or 545722 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 66031031 is about 8125.9480062329. The cubic root of 66031031 is about 404.1873273504.

Adding to 66031031 its reverse (13013066), we get a palindrome (79044097).

The spelling of 66031031 in words is "sixty-six million, thirty-one thousand, thirty-one".