647665566746 has 16 divisors (see below), whose sum is σ = 1062208759968. Its totient is φ = 293728890000.

The previous prime is 647665566701. The next prime is 647665566763.

647665566746 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33217505 + ... + 33236996.

It is an arithmetic number, because the mean of its divisors is an integer number (66388047498).

Almost surely, 2^647665566746 is an apocalyptic number.

647665566746 is a deficient number, since it is larger than the sum of its proper divisors (414543193222).

647665566746 is a wasteful number, since it uses less digits than its factorization.

647665566746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66454957.

The product of its digits is 914457600, while the sum is 68.

The spelling of 647665566746 in words is "six hundred forty-seven billion, six hundred sixty-five million, five hundred sixty-six thousand, seven hundred forty-six".