65555998 has 8 divisors (see below), whose sum is σ = 99289008. Its totient is φ = 32459664.

The previous prime is 65555993. The next prime is 65555999. The reversal of 65555998 is 89955556.

It is a happy number.

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 (65555993) 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, 158911 + ... + 159322.

It is an arithmetic number, because the mean of its divisors is an integer number (12411126).

Almost surely, 2^65555998 is an apocalyptic number.

65555998 is a deficient number, since it is larger than the sum of its proper divisors (33733010).

65555998 is a wasteful number, since it uses less digits than its factorization.

65555998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318338.

The product of its digits is 2430000, while the sum is 52.

The square root of 65555998 is about 8096.6658570056. The cubic root of 65555998 is about 403.2157407495.

The spelling of 65555998 in words is "sixty-five million, five hundred fifty-five thousand, nine hundred ninety-eight".