65644246 has 4 divisors (see below), whose sum is σ = 98466372. Its totient is φ = 32822122.

The previous prime is 65644223. The next prime is 65644283. The reversal of 65644246 is 64244656.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16411060 + ... + 16411063.

It is an arithmetic number, because the mean of its divisors is an integer number (24616593).

Almost surely, 2^65644246 is an apocalyptic number.

65644246 is a deficient number, since it is larger than the sum of its proper divisors (32822126).

65644246 is a wasteful number, since it uses less digits than its factorization.

65644246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32822125.

The product of its digits is 138240, while the sum is 37.

The square root of 65644246 is about 8102.1136748382. The cubic root of 65644246 is about 403.3965888238.

The spelling of 65644246 in words is "sixty-five million, six hundred forty-four thousand, two hundred forty-six".