66126161 has 8 divisors (see below), whose sum is σ = 67008480. Its totient is φ = 65248128.

The previous prime is 66126157. The next prime is 66126163. The reversal of 66126161 is 16162166.

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 66126161 - 2² = 66126157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66126163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39830 + ... + 41456.

It is an arithmetic number, because the mean of its divisors is an integer number (8376060).

Almost surely, 2^66126161 is an apocalyptic number.

It is an amenable number.

66126161 is a deficient number, since it is larger than the sum of its proper divisors (882319).

66126161 is a wasteful number, since it uses less digits than its factorization.

66126161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143.

The product of its digits is 2592, while the sum is 29.

The square root of 66126161 is about 8131.7993703731. The cubic root of 66126161 is about 404.3813365896.

The spelling of 66126161 in words is "sixty-six million, one hundred twenty-six thousand, one hundred sixty-one".