651661050 has 96 divisors (see below), whose sum is σ = 1714622400. Its totient is φ = 163330560.

The previous prime is 651661039. The next prime is 651661067. The reversal of 651661050 is 50166156.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 651660999 and 651661017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 389616 + ... + 391284.

It is an arithmetic number, because the mean of its divisors is an integer number (17860650).

Almost surely, 2^651661050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651661050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857311200).

651661050 is an abundant number, since it is smaller than the sum of its proper divisors (1062961350).

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

651661050 is a wasteful number, since it uses less digits than its factorization.

651661050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 651661050 is about 25527.6526535442. The cubic root of 651661050 is about 866.9763579291.

The spelling of 651661050 in words is "six hundred fifty-one million, six hundred sixty-one thousand, fifty".