65074181 has 4 divisors (see below), whose sum is σ = 68902092. Its totient is φ = 61246272.

The previous prime is 65074133. The next prime is 65074201. The reversal of 65074181 is 18147056.

It is a happy number.

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 26522500 + 38551681 = 5150^2 + 6209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65074181 is a prime.

It is a super-2 number, since 2×65074181² = 8469298065641522, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65076181) 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, 1913930 + ... + 1913963.

It is an arithmetic number, because the mean of its divisors is an integer number (17225523).

Almost surely, 2^65074181 is an apocalyptic number.

It is an amenable number.

65074181 is a deficient number, since it is larger than the sum of its proper divisors (3827911).

65074181 is a wasteful number, since it uses less digits than its factorization.

65074181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3827910.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 65074181 is about 8066.8569467916. The cubic root of 65074181 is about 402.2254723031.

The spelling of 65074181 in words is "sixty-five million, seventy-four thousand, one hundred eighty-one".