65445866 has 16 divisors (see below), whose sum is σ = 102249000. Its totient is φ = 31378368.

The previous prime is 65445857. The next prime is 65445893. The reversal of 65445866 is 66854456.

It can be written as a sum of positive squares in 4 ways, for example, as 62078641 + 3367225 = 7879^2 + 1835^2 .

It is a super-2 number, since 2×65445866² = 8566322752979912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4856 + ... + 12428.

Almost surely, 2^65445866 is an apocalyptic number.

65445866 is a deficient number, since it is larger than the sum of its proper divisors (36803134).

65445866 is a wasteful number, since it uses less digits than its factorization.

65445866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7753.

The product of its digits is 691200, while the sum is 44.

The square root of 65445866 is about 8089.8619271283. The cubic root of 65445866 is about 402.9898176305.

The spelling of 65445866 in words is "sixty-five million, four hundred forty-five thousand, eight hundred sixty-six".