65676789 has 6 divisors (see below), whose sum is σ = 94866486. Its totient is φ = 43784520.

The previous prime is 65676769. The next prime is 65676791. The reversal of 65676789 is 98767656.

It is a happy number.

65676789 is a `hidden beast` number, since 6 + 567 + 6 + 78 + 9 = 666.

65676789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 56927025 + 8749764 = 7545^2 + 2958^2 .

It is not a de Polignac number, because 65676789 - 2⁵ = 65676757 is a prime.

It is a super-2 number, since 2×65676789² = 8626881226701042, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65676769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3648702 + ... + 3648719.

It is an arithmetic number, because the mean of its divisors is an integer number (15811081).

Almost surely, 2^65676789 is an apocalyptic number.

It is an amenable number.

65676789 is a deficient number, since it is larger than the sum of its proper divisors (29189697).

65676789 is a wasteful number, since it uses less digits than its factorization.

65676789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7297427 (or 7297424 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 65676789 is about 8104.1217290956. The cubic root of 65676789 is about 403.4632388210.

The spelling of 65676789 in words is "sixty-five million, six hundred seventy-six thousand, seven hundred eighty-nine".