65655655 has 12 divisors (see below), whose sum is σ = 85314600. Its totient is φ = 48483552.

The previous prime is 65655641. The next prime is 65655661. The reversal of 65655655 is 55655656.

It is a de Polignac number, because none of the positive numbers 2^k-65655655 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38005 + ... + 39694.

It is an arithmetic number, because the mean of its divisors is an integer number (7109550).

Almost surely, 2^65655655 is an apocalyptic number.

65655655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

65655655 is a deficient number, since it is larger than the sum of its proper divisors (19658945).

65655655 is a wasteful number, since it uses less digits than its factorization.

65655655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77730 (or 77717 counting only the distinct ones).

The product of its digits is 675000, while the sum is 43.

The square root of 65655655 is about 8102.8177197812. The cubic root of 65655655 is about 403.4199576406.

Subtracting from 65655655 its reverse (55655656), we obtain a palindrome (9999999).

The spelling of 65655655 in words is "sixty-five million, six hundred fifty-five thousand, six hundred fifty-five".