65664386 has 8 divisors (see below), whose sum is σ = 101673984. Its totient is φ = 31773060.

The previous prime is 65664383. The next prime is 65664409. The reversal of 65664386 is 68346656.

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

It is a super-3 number, since 3×65664386³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (65664383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529490 + ... + 529613.

It is an arithmetic number, because the mean of its divisors is an integer number (12709248).

Almost surely, 2^65664386 is an apocalyptic number.

65664386 is a deficient number, since it is larger than the sum of its proper divisors (36009598).

65664386 is a wasteful number, since it uses less digits than its factorization.

65664386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059136.

The product of its digits is 622080, while the sum is 44.

The square root of 65664386 is about 8103.3564650705. The cubic root of 65664386 is about 403.4378393373.

The spelling of 65664386 in words is "sixty-five million, six hundred sixty-four thousand, three hundred eighty-six".