66165037 has 16 divisors (see below), whose sum is σ = 73232640. Its totient is φ = 59496192.

The previous prime is 66165031. The next prime is 66165059. The reversal of 66165037 is 73056166.

It is a happy number.

It is not a de Polignac number, because 66165037 - 2⁷ = 66164909 is a prime.

It is a super-2 number, since 2×66165037² = 8755624242422738, 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 = 66164993 and 66165011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66165031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50128 + ... + 51430.

It is an arithmetic number, because the mean of its divisors is an integer number (4577040).

Almost surely, 2^66165037 is an apocalyptic number.

It is an amenable number.

66165037 is a deficient number, since it is larger than the sum of its proper divisors (7067603).

66165037 is a wasteful number, since it uses less digits than its factorization.

66165037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 66165037 is about 8134.1893880091. The cubic root of 66165037 is about 404.4605672039.

The spelling of 66165037 in words is "sixty-six million, one hundred sixty-five thousand, thirty-seven".