64449866 has 16 divisors (see below), whose sum is σ = 104244000. Its totient is φ = 29708208.

The previous prime is 64449863. The next prime is 64449877. The reversal of 64449866 is 66894446.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64449866.

It is not an unprimeable number, because it can be changed into a prime (64449863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37085 + ... + 38783.

It is an arithmetic number, because the mean of its divisors is an integer number (6515250).

Almost surely, 2^64449866 is an apocalyptic number.

64449866 is a deficient number, since it is larger than the sum of its proper divisors (39794134).

64449866 is a wasteful number, since it uses less digits than its factorization.

64449866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173.

The product of its digits is 995328, while the sum is 47.

The square root of 64449866 is about 8028.0673888552. The cubic root of 64449866 is about 400.9350334115.

The spelling of 64449866 in words is "sixty-four million, four hundred forty-nine thousand, eight hundred sixty-six".