65040660 has 36 divisors (see below), whose sum is σ = 197290548. Its totient is φ = 17344128.

The previous prime is 65040641. The next prime is 65040671. The reversal of 65040660 is 6604056.

65040660 is a `hidden beast` number, since 650 + 4 + 0 + 6 + 6 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11370384 + 53670276 = 3372^2 + 7326^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180489 + ... + 180848.

It is an arithmetic number, because the mean of its divisors is an integer number (5480293).

Almost surely, 2^65040660 is an apocalyptic number.

65040660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65040660 is an abundant number, since it is smaller than the sum of its proper divisors (132249888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65040660 is a wasteful number, since it uses less digits than its factorization.

65040660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361352 (or 361347 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 65040660 is about 8064.7789802325. The cubic root of 65040660 is about 402.1563956707.

The spelling of 65040660 in words is "sixty-five million, forty thousand, six hundred sixty".