65005061 has 16 divisors (see below), whose sum is σ = 77898240. Its totient is φ = 53547120.

The previous prime is 65005043. The next prime is 65005063. The reversal of 65005061 is 16050056.

It is a de Polignac number, because none of the positive numbers 2^k-65005061 is a prime.

It is a super-2 number, since 2×65005061² = 8451315911227442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65005063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955 + ... + 11568.

It is an arithmetic number, because the mean of its divisors is an integer number (4868640).

Almost surely, 2^65005061 is an apocalyptic number.

It is an amenable number.

65005061 is a deficient number, since it is larger than the sum of its proper divisors (12893179).

65005061 is a wasteful number, since it uses less digits than its factorization.

65005061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13576.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 65005061 is about 8062.5716120851. The cubic root of 65005061 is about 402.0830109179.

The spelling of 65005061 in words is "sixty-five million, five thousand, sixty-one".