66735161 has 8 divisors (see below), whose sum is σ = 68841864. Its totient is φ = 64644480.

The previous prime is 66735139. The next prime is 66735169. The reversal of 66735161 is 16153766.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5973136 + 60762025 = 2444^2 + 7795^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66735161 - 2¹⁴ = 66718777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66735169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4751 + ... + 12491.

It is an arithmetic number, because the mean of its divisors is an integer number (8605233).

Almost surely, 2^66735161 is an apocalyptic number.

It is an amenable number.

66735161 is a deficient number, since it is larger than the sum of its proper divisors (2106703).

66735161 is a wasteful number, since it uses less digits than its factorization.

66735161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8011.

The product of its digits is 22680, while the sum is 35.

The square root of 66735161 is about 8169.1591366554. The cubic root of 66735161 is about 405.6189509648.

The spelling of 66735161 in words is "sixty-six million, seven hundred thirty-five thousand, one hundred sixty-one".