65655566 has 8 divisors (see below), whose sum is σ = 98752800. Its totient is φ = 32737968.

The previous prime is 65655563. The next prime is 65655607. The reversal of 65655566 is 66555656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65655563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43991 + ... + 45458.

It is an arithmetic number, because the mean of its divisors is an integer number (12344100).

Almost surely, 2^65655566 is an apocalyptic number.

65655566 is a deficient number, since it is larger than the sum of its proper divisors (33097234).

65655566 is a wasteful number, since it uses less digits than its factorization.

65655566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89818.

The product of its digits is 810000, while the sum is 44.

The square root of 65655566 is about 8102.8122278626. The cubic root of 65655566 is about 403.4197753542.

The spelling of 65655566 in words is "sixty-five million, six hundred fifty-five thousand, five hundred sixty-six".