5651660 has 72 divisors (see below), whose sum is σ = 14172480. Its totient is φ = 1886976.

The previous prime is 5651623. The next prime is 5651707. The reversal of 5651660 is 661565.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71501 + ... + 71579.

It is an arithmetic number, because the mean of its divisors is an integer number (196840).

Almost surely, 2^5651660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5651660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7086240).

5651660 is an abundant number, since it is smaller than the sum of its proper divisors (8520820).

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

5651660 is a wasteful number, since it uses less digits than its factorization.

5651660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 5651660 is about 2377.3220227811. The cubic root of 5651660 is about 178.1251907251.

The spelling of 5651660 in words is "five million, six hundred fifty-one thousand, six hundred sixty".