65986765 has 16 divisors (see below), whose sum is σ = 85660848. Its totient is φ = 48508416.

The previous prime is 65986763. The next prime is 65986769. The reversal of 65986765 is 56768956.

It can be written as a sum of positive squares in 8 ways, for example, as 149769 + 65836996 = 387^2 + 8114^2 .

It is a cyclic number.

It is not a de Polignac number, because 65986765 - 2¹ = 65986763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65986763) 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, 12967 + ... + 17323.

It is an arithmetic number, because the mean of its divisors is an integer number (5353803).

Almost surely, 2^65986765 is an apocalyptic number.

65986765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65986765 is a deficient number, since it is larger than the sum of its proper divisors (19674083).

65986765 is a wasteful number, since it uses less digits than its factorization.

65986765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608.

The product of its digits is 2721600, while the sum is 52.

The square root of 65986765 is about 8123.2238058544. The cubic root of 65986765 is about 404.0969872202.

The spelling of 65986765 in words is "sixty-five million, nine hundred eighty-six thousand, seven hundred sixty-five".