65664446 has 8 divisors (see below), whose sum is σ = 98651784. Its totient is φ = 32780520.

The previous prime is 65664427. The next prime is 65664481. The reversal of 65664446 is 64446656.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24245 + ... + 26816.

It is an arithmetic number, because the mean of its divisors is an integer number (12331473).

Almost surely, 2^65664446 is an apocalyptic number.

65664446 is a deficient number, since it is larger than the sum of its proper divisors (32987338).

65664446 is a wasteful number, since it uses less digits than its factorization.

65664446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51706.

The product of its digits is 414720, while the sum is 41.

The square root of 65664446 is about 8103.3601672393. The cubic root of 65664446 is about 403.4379622160.

The spelling of 65664446 in words is "sixty-five million, six hundred sixty-four thousand, four hundred forty-six".