65553550 has 24 divisors (see below), whose sum is σ = 123079176. Its totient is φ = 25974240.

The previous prime is 65553533. The next prime is 65553571. The reversal of 65553550 is 5535556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 777 + ... + 11476.

It is an arithmetic number, because the mean of its divisors is an integer number (5128299).

Almost surely, 2^65553550 is an apocalyptic number.

65553550 is a deficient number, since it is larger than the sum of its proper divisors (57525626).

65553550 is a wasteful number, since it uses less digits than its factorization.

65553550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12372 (or 12367 counting only the distinct ones).

The product of its (nonzero) digits is 56250, while the sum is 34.

The square root of 65553550 is about 8096.5146822568. The cubic root of 65553550 is about 403.2107217101.

The spelling of 65553550 in words is "sixty-five million, five hundred fifty-three thousand, five hundred fifty".