66012031 has 2 divisors, whose sum is σ = 66012032. Its totient is φ = 66012030.

The previous prime is 66011941. The next prime is 66012043. The reversal of 66012031 is 13021066.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66012031 is a prime.

It is a super-2 number, since 2×66012031² = 8715176473489922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66015031) 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 as a sum of consecutive naturals, namely, 33006015 + 33006016.

It is an arithmetic number, because the mean of its divisors is an integer number (33006016).

Almost surely, 2^66012031 is an apocalyptic number.

66012031 is a deficient number, since it is larger than the sum of its proper divisors (1).

66012031 is an equidigital number, since it uses as much as digits as its factorization.

66012031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 66012031 is about 8124.7788277589. The cubic root of 66012031 is about 404.1485562060.

Adding to 66012031 its reverse (13021066), we get a palindrome (79033097).

The spelling of 66012031 in words is "sixty-six million, twelve thousand, thirty-one".