66031039 has 2 divisors, whose sum is σ = 66031040. Its totient is φ = 66031038.

The previous prime is 66031037. The next prime is 66031079. The reversal of 66031039 is 93013066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66031039 - 2¹ = 66031037 is a prime.

It is a super-2 number, since 2×66031039² = 8720196222839042, which contains 22 as substring.

Together with 66031037, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66030998 and 66031016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66031037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33015519 + 33015520.

It is an arithmetic number, because the mean of its divisors is an integer number (33015520).

Almost surely, 2^66031039 is an apocalyptic number.

66031039 is a deficient number, since it is larger than the sum of its proper divisors (1).

66031039 is an equidigital number, since it uses as much as digits as its factorization.

66031039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 66031039 is about 8125.9484984831. The cubic root of 66031039 is about 404.1873436736.

The spelling of 66031039 in words is "sixty-six million, thirty-one thousand, thirty-nine".