65312166 has 8 divisors (see below), whose sum is σ = 130624344. Its totient is φ = 21770720.

The previous prime is 65312153. The next prime is 65312167. The reversal of 65312166 is 66121356.

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

65312166 is an admirable number.

It is a super-2 number, since 2×65312166² = 8531358055223112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65312167) 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, 5442675 + ... + 5442686.

It is an arithmetic number, because the mean of its divisors is an integer number (16328043).

Almost surely, 2^65312166 is an apocalyptic number.

65312166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65312166 is a wasteful number, since it uses less digits than its factorization.

65312166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10885366.

The product of its digits is 6480, while the sum is 30.

The square root of 65312166 is about 8081.5942734092. The cubic root of 65312166 is about 402.7152065965.

The spelling of 65312166 in words is "sixty-five million, three hundred twelve thousand, one hundred sixty-six".