651166 has 16 divisors (see below), whose sum is σ = 1029600. Its totient is φ = 308448.

The previous prime is 651143. The next prime is 651169. The reversal of 651166 is 661156.

It is a self number, because there is not a number n which added to its sum of digits gives 651166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651169) by changing a digit.

651166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5920 + ... + 6028.

It is an arithmetic number, because the mean of its divisors is an integer number (64350).

2⁶⁵¹¹⁶⁶ is an apocalyptic number.

651166 is a deficient number, since it is larger than the sum of its proper divisors (378434).

651166 is a wasteful number, since it uses less digits than its factorization.

651166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its digits is 1080, while the sum is 25.

The square root of 651166 is about 806.9485733304. The cubic root of 651166 is about 86.6756762494.

The spelling of 651166 in words is "six hundred fifty-one thousand, one hundred sixty-six".