64066890 has 16 divisors (see below), whose sum is σ = 153760608. Its totient is φ = 17084496.

The previous prime is 64066883. The next prime is 64066901. The reversal of 64066890 is 9866046.

64066890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1067752 + ... + 1067811.

It is an arithmetic number, because the mean of its divisors is an integer number (9610038).

Almost surely, 2^64066890 is an apocalyptic number.

64066890 is an abundant number, since it is smaller than the sum of its proper divisors (89693718).

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

64066890 is a wasteful number, since it uses less digits than its factorization.

64066890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135573.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 64066890 is about 8004.1795332189. The cubic root of 64066890 is about 400.1393056459.

The spelling of 64066890 in words is "sixty-four million, sixty-six thousand, eight hundred ninety".