65081566 has 8 divisors (see below), whose sum is σ = 106497144. Its totient is φ = 29582520.

The previous prime is 65081563. The next prime is 65081609. The reversal of 65081566 is 66518056.

65081566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×65081566² = 8471220466024712, which contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1479105 + ... + 1479148.

It is an arithmetic number, because the mean of its divisors is an integer number (13312143).

Almost surely, 2^65081566 is an apocalyptic number.

65081566 is a deficient number, since it is larger than the sum of its proper divisors (41415578).

65081566 is a wasteful number, since it uses less digits than its factorization.

65081566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958266.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 65081566 is about 8067.3146709422. The cubic root of 65081566 is about 402.2406873633.

The spelling of 65081566 in words is "sixty-five million, eighty-one thousand, five hundred sixty-six".