649305066 has 16 divisors (see below), whose sum is σ = 1299442464. Its totient is φ = 216296304.

The previous prime is 649305053. The next prime is 649305071. The reversal of 649305066 is 660503946.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24300 + ... + 43463.

It is an arithmetic number, because the mean of its divisors is an integer number (81215154).

Almost surely, 2^649305066 is an apocalyptic number.

649305066 is an abundant number, since it is smaller than the sum of its proper divisors (650137398).

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

649305066 is a wasteful number, since it uses less digits than its factorization.

649305066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69365.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 649305066 is about 25481.4651462588. The cubic root of 649305066 is about 865.9302880768.

It can be divided in two parts, 64930 and 5066, that added together give a palindrome (69996).

The spelling of 649305066 in words is "six hundred forty-nine million, three hundred five thousand, sixty-six".