651960 has 48 divisors (see below), whose sum is σ = 2120040. Its totient is φ = 173760.

The previous prime is 651943. The next prime is 651971. The reversal of 651960 is 69156.

651960 is a `hidden beast` number, since 651 + 9 + 6 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

651960 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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546 + ... + 1265.

2⁶⁵¹⁹⁶⁰ is an apocalyptic number.

651960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

651960 is an abundant number, since it is smaller than the sum of its proper divisors (1468080).

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

651960 is a wasteful number, since it uses less digits than its factorization.

651960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 651960 is about 807.4404002773. The cubic root of 651960 is about 86.7108913015.

It can be divided in two parts, 65 and 1960, that added together give a square (2025 = 45²).

The spelling of 651960 in words is "six hundred fifty-one thousand, nine hundred sixty".