651771330 has 128 divisors (see below), whose sum is σ = 1917665280. Its totient is φ = 138378240.

The previous prime is 651771293. The next prime is 651771349. The reversal of 651771330 is 33177156.

It is a junction number, because it is equal to n+sod(n) for n = 651771291 and 651771300.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 280875 + ... + 283185.

It is an arithmetic number, because the mean of its divisors is an integer number (14981760).

Almost surely, 2^651771330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651771330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (958832640).

651771330 is an abundant number, since it is smaller than the sum of its proper divisors (1265893950).

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

651771330 is a wasteful number, since it uses less digits than its factorization.

651771330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424.

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 651771330 is about 25529.8125727550. The cubic root of 651771330 is about 867.0252610411.

The spelling of 651771330 in words is "six hundred fifty-one million, seven hundred seventy-one thousand, three hundred thirty".