66015161 has 4 divisors (see below), whose sum is σ = 66945024. Its totient is φ = 65085300.

The previous prime is 66015137. The next prime is 66015179. The reversal of 66015161 is 16151066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16151066 = 2 ⋅8075533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66015161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66015161.

It is not an unprimeable number, because it can be changed into a prime (66015121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464825 + ... + 464966.

It is an arithmetic number, because the mean of its divisors is an integer number (16736256).

Almost surely, 2^66015161 is an apocalyptic number.

It is an amenable number.

66015161 is a deficient number, since it is larger than the sum of its proper divisors (929863).

66015161 is an equidigital number, since it uses as much as digits as its factorization.

66015161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929862.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 66015161 is about 8124.9714461037. The cubic root of 66015161 is about 404.1549437537.

The spelling of 66015161 in words is "sixty-six million, fifteen thousand, one hundred sixty-one".