65918071 has 4 divisors (see below), whose sum is σ = 65940552. Its totient is φ = 65895592.

The previous prime is 65918029. The next prime is 65918089. The reversal of 65918071 is 17081956.

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 65918071 - 2²¹ = 63820919 is a prime.

It is a super-2 number, since 2×65918071² = 8690384168722082, which contains 22 as substring.

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 65918071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65918371) 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, 6040 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (16485138).

Almost surely, 2^65918071 is an apocalyptic number.

65918071 is a deficient number, since it is larger than the sum of its proper divisors (22481).

65918071 is a wasteful number, since it uses less digits than its factorization.

65918071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22480.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 65918071 is about 8118.9944574436. The cubic root of 65918071 is about 403.9567132493.

The spelling of 65918071 in words is "sixty-five million, nine hundred eighteen thousand, seventy-one".