651122766 has 64 divisors (see below), whose sum is σ = 1659571200. Its totient is φ = 185368608.

The previous prime is 651122743. The next prime is 651122767. The reversal of 651122766 is 667221156.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 651122766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651122767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107815 + ... + 113693.

It is an arithmetic number, because the mean of its divisors is an integer number (25930800).

Almost surely, 2^651122766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651122766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (829785600).

651122766 is an abundant number, since it is smaller than the sum of its proper divisors (1008448434).

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

651122766 is a wasteful number, since it uses less digits than its factorization.

651122766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6190 (or 6184 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 651122766 is about 25517.1073203841. The cubic root of 651122766 is about 866.7375793718.

The spelling of 651122766 in words is "six hundred fifty-one million, one hundred twenty-two thousand, seven hundred sixty-six".