649066446 has 80 divisors (see below), whose sum is σ = 1696226400. Its totient is φ = 185431680.

The previous prime is 649066441. The next prime is 649066471. The reversal of 649066446 is 644660946.

649066446 is a `hidden beast` number, since 64 + 90 + 66 + 446 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649066441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 49726 + ... + 61406.

It is an arithmetic number, because the mean of its divisors is an integer number (21202830).

Almost surely, 2^649066446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649066446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848113200).

649066446 is an abundant number, since it is smaller than the sum of its proper divisors (1047159954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649066446 is a wasteful number, since it uses less digits than its factorization.

649066446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11716 (or 11693 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The square root of 649066446 is about 25476.7824891606. The cubic root of 649066446 is about 865.8241984468.

The spelling of 649066446 in words is "six hundred forty-nine million, sixty-six thousand, four hundred forty-six".