64001866 has 8 divisors (see below), whose sum is σ = 96092100. Its totient is φ = 31971168.

The previous prime is 64001863. The next prime is 64001867. The reversal of 64001866 is 66810046.

64001866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 58140625 + 5861241 = 7625^2 + 2421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64001863) 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 3 ways as a sum of consecutive naturals, for example, 12091 + ... + 16558.

Almost surely, 2^64001866 is an apocalyptic number.

64001866 is a deficient number, since it is larger than the sum of its proper divisors (32090234).

64001866 is a wasteful number, since it uses less digits than its factorization.

64001866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29768.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 64001866 is about 8000.1166241499. The cubic root of 64001866 is about 400.0038874622.

The spelling of 64001866 in words is "sixty-four million, one thousand, eight hundred sixty-six".