65655550 has 24 divisors (see below), whose sum is σ = 122371632. Its totient is φ = 26208000.

The previous prime is 65655503. The next prime is 65655559. The reversal of 65655550 is 5555656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65655559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30510 + ... + 32590.

It is an arithmetic number, because the mean of its divisors is an integer number (5098818).

Almost surely, 2^65655550 is an apocalyptic number.

65655550 is a deficient number, since it is larger than the sum of its proper divisors (56716082).

65655550 is a wasteful number, since it uses less digits than its factorization.

65655550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724 (or 2719 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 37.

The square root of 65655550 is about 8102.8112405510. The cubic root of 65655550 is about 403.4197425836.

The spelling of 65655550 in words is "sixty-five million, six hundred fifty-five thousand, five hundred fifty".