651221166200 has 48 divisors (see below), whose sum is σ = 1651733690760. Its totient is φ = 236807696000.

The previous prime is 651221166187. The next prime is 651221166209. The reversal of 651221166200 is 2661122156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651221166209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148002611 + ... + 148007010.

Almost surely, 2^651221166200 is an apocalyptic number.

It is an amenable number.

651221166200 is an abundant number, since it is smaller than the sum of its proper divisors (1000512524560).

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

651221166200 is a wasteful number, since it uses less digits than its factorization.

651221166200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296009648 (or 296009639 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 651221166200 its reverse (2661122156), we get a palindrome (653882288356).

The spelling of 651221166200 in words is "six hundred fifty-one billion, two hundred twenty-one million, one hundred sixty-six thousand, two hundred".