649119966 has 32 divisors (see below), whose sum is σ = 1417540608. Its totient is φ = 196525440.

The previous prime is 649119923. The next prime is 649119967. The reversal of 649119966 is 669911946.

649119966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649119967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81811 + ... + 89393.

It is an arithmetic number, because the mean of its divisors is an integer number (44298144).

Almost surely, 2^649119966 is an apocalyptic number.

649119966 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

649119966 is an abundant number, since it is smaller than the sum of its proper divisors (768420642).

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

649119966 is a wasteful number, since it uses less digits than its factorization.

649119966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8896.

The product of its digits is 629856, while the sum is 51.

The square root of 649119966 is about 25477.8328356240. The cubic root of 649119966 is about 865.8479955161.

The spelling of 649119966 in words is "six hundred forty-nine million, one hundred nineteen thousand, nine hundred sixty-six".