651066 has 32 divisors (see below), whose sum is σ = 1487808. Its totient is φ = 188160.

The previous prime is 651043. The next prime is 651067. The reversal of 651066 is 660156.

It is not an unprimeable number, because it can be changed into a prime (651067) by changing a digit.

651066 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1081 + ... + 1571.

It is an arithmetic number, because the mean of its divisors is an integer number (46494).

2⁶⁵¹⁰⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (743904).

651066 is an abundant number, since it is smaller than the sum of its proper divisors (836742).

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

651066 is a wasteful number, since it uses less digits than its factorization.

651066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 651066 is about 806.8866091341. The cubic root of 651066 is about 86.6712390750.

The spelling of 651066 in words is "six hundred fifty-one thousand, sixty-six".