66315161 has 4 divisors (see below), whose sum is σ = 72343824. Its totient is φ = 60286500.

The previous prime is 66315143. The next prime is 66315191. The reversal of 66315161 is 16151366.

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.

It is a cyclic number.

It is not a de Polignac number, because 66315161 - 2⁶ = 66315097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66315121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3014315 + ... + 3014336.

It is an arithmetic number, because the mean of its divisors is an integer number (18085956).

Almost surely, 2^66315161 is an apocalyptic number.

It is an amenable number.

66315161 is a deficient number, since it is larger than the sum of its proper divisors (6028663).

66315161 is a wasteful number, since it uses less digits than its factorization.

66315161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6028662.

The product of its digits is 3240, while the sum is 29.

The square root of 66315161 is about 8143.4121226916. The cubic root of 66315161 is about 404.7662340441.

The spelling of 66315161 in words is "sixty-six million, three hundred fifteen thousand, one hundred sixty-one".