65554890 has 64 divisors (see below), whose sum is σ = 167774976. Its totient is φ = 16335872.

The previous prime is 65554847. The next prime is 65554897. The reversal of 65554890 is 9845556.

65554890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (65554897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87859 + ... + 88601.

It is an arithmetic number, because the mean of its divisors is an integer number (2621484).

Almost surely, 2^65554890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65554890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83887488).

65554890 is an abundant number, since it is smaller than the sum of its proper divisors (102220086).

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

65554890 is a wasteful number, since it uses less digits than its factorization.

65554890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 65554890 is about 8096.5974334902. The cubic root of 65554890 is about 403.2134690756.

The spelling of 65554890 in words is "sixty-five million, five hundred fifty-four thousand, eight hundred ninety".