66473161 has 4 divisors (see below), whose sum is σ = 66491332. Its totient is φ = 66454992.

The previous prime is 66473159. The next prime is 66473167. The reversal of 66473161 is 16137466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62647225 + 3825936 = 7915^2 + 1956^2 .

It is a cyclic number.

It is not a de Polignac number, because 66473161 - 2¹ = 66473159 is a prime.

It is a super-2 number, since 2×66473161² = 8837362266663842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66473167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1470 + ... + 11623.

It is an arithmetic number, because the mean of its divisors is an integer number (16622833).

Almost surely, 2^66473161 is an apocalyptic number.

It is an amenable number.

66473161 is a deficient number, since it is larger than the sum of its proper divisors (18171).

66473161 is a wasteful number, since it uses less digits than its factorization.

66473161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18170.

The product of its digits is 18144, while the sum is 34.

The square root of 66473161 is about 8153.1074444042. The cubic root of 66473161 is about 405.0874393332.

The spelling of 66473161 in words is "sixty-six million, four hundred seventy-three thousand, one hundred sixty-one".