66165031 has 2 divisors, whose sum is σ = 66165032. Its totient is φ = 66165030.

The previous prime is 66165017. The next prime is 66165059. The reversal of 66165031 is 13056166.

It is an a-pointer prime, because the next prime (66165059) can be obtained adding 66165031 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66165031 - 2⁹ = 66164519 is a prime.

It is a super-2 number, since 2×66165031² = 8755622654461922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66165131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33082515 + 33082516.

It is an arithmetic number, because the mean of its divisors is an integer number (33082516).

Almost surely, 2^66165031 is an apocalyptic number.

66165031 is a deficient number, since it is larger than the sum of its proper divisors (1).

66165031 is an equidigital number, since it uses as much as digits as its factorization.

66165031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 66165031 is about 8134.1890191955. The cubic root of 66165031 is about 404.4605549781.

The spelling of 66165031 in words is "sixty-six million, one hundred sixty-five thousand, thirty-one".