649372788066 has 32 divisors (see below), whose sum is σ = 1375342675200. Its totient is φ = 203695122176.

The previous prime is 649372788037. The next prime is 649372788187. The reversal of 649372788066 is 660887273946.

It is a super-2 number, since 2×649372788066² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 649372787988 and 649372788006.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245335 + ... + 1165733.

It is an arithmetic number, because the mean of its divisors is an integer number (42979458600).

Almost surely, 2^649372788066 is an apocalyptic number.

649372788066 is an abundant number, since it is smaller than the sum of its proper divisors (725969887134).

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

649372788066 is a wasteful number, since it uses less digits than its factorization.

649372788066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927338.

The product of its (nonzero) digits is 146313216, while the sum is 66.

The spelling of 649372788066 in words is "six hundred forty-nine billion, three hundred seventy-two million, seven hundred eighty-eight thousand, sixty-six".