65556740 has 24 divisors (see below), whose sum is σ = 138015360. Its totient is φ = 26156768.

The previous prime is 65556731. The next prime is 65556773. The reversal of 65556740 is 4765556.

It is a junction number, because it is equal to n+sod(n) for n = 65556694 and 65556703.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4469 + ... + 12291.

It is an arithmetic number, because the mean of its divisors is an integer number (5750640).

Almost surely, 2^65556740 is an apocalyptic number.

It is an amenable number.

65556740 is an abundant number, since it is smaller than the sum of its proper divisors (72458620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65556740 is a wasteful number, since it uses less digits than its factorization.

65556740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8251 (or 8249 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 65556740 is about 8096.7116782062. The cubic root of 65556740 is about 403.2172620187.

The spelling of 65556740 in words is "sixty-five million, five hundred fifty-six thousand, seven hundred forty".