65081567 has 4 divisors (see below), whose sum is σ = 65313456. Its totient is φ = 64849680.

The previous prime is 65081563. The next prime is 65081609. The reversal of 65081567 is 76518056.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65081567 - 2² = 65081563 is a prime.

It is a super-3 number, since 3×65081567³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 65081567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65081563) 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, 115523 + ... + 116084.

It is an arithmetic number, because the mean of its divisors is an integer number (16328364).

Almost surely, 2^65081567 is an apocalyptic number.

65081567 is a deficient number, since it is larger than the sum of its proper divisors (231889).

65081567 is a wasteful number, since it uses less digits than its factorization.

65081567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231888.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 65081567 is about 8067.3147329207. The cubic root of 65081567 is about 402.2406894235.

The spelling of 65081567 in words is "sixty-five million, eighty-one thousand, five hundred sixty-seven".