651606 has 16 divisors (see below), whose sum is σ = 1311744. Its totient is φ = 215784.

The previous prime is 651587. The next prime is 651617. The reversal of 651606 is 606156.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095 + ... + 1581.

It is an arithmetic number, because the mean of its divisors is an integer number (81984).

2⁶⁵¹⁶⁰⁶ is an apocalyptic number.

651606 is an abundant number, since it is smaller than the sum of its proper divisors (660138).

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

651606 is a wasteful number, since it uses less digits than its factorization.

651606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715.

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

The square root of 651606 is about 807.2211592866. The cubic root of 651606 is about 86.6951944219.

The spelling of 651606 in words is "six hundred fifty-one thousand, six hundred six".