656611140 has 24 divisors (see below), whose sum is σ = 1838511360. Its totient is φ = 175096288.

The previous prime is 656611051. The next prime is 656611141. The reversal of 656611140 is 41116656.

It is a super-2 number, since 2×656611140² = 862276378344199200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 656611098 and 656611107.

It is not an unprimeable number, because it can be changed into a prime (656611141) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5471700 + ... + 5471819.

It is an arithmetic number, because the mean of its divisors is an integer number (76604640).

Almost surely, 2^656611140 is an apocalyptic number.

656611140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656611140 is an abundant number, since it is smaller than the sum of its proper divisors (1181900220).

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

656611140 is a wasteful number, since it uses less digits than its factorization.

656611140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10943531 (or 10943529 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 656611140 is about 25624.4246764683. The cubic root of 656611140 is about 869.1660392609.

Adding to 656611140 its reverse (41116656), we get a palindrome (697727796).

The spelling of 656611140 in words is "six hundred fifty-six million, six hundred eleven thousand, one hundred forty".