5551656 has 64 divisors (see below), whose sum is σ = 16044480. Its totient is φ = 1582080.

The previous prime is 5551643. The next prime is 5551669. The reversal of 5551656 is 6561555.

It is an interprime number because it is at equal distance from previous prime (5551643) and next prime (5551669).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3870 + ... + 5106.

It is an arithmetic number, because the mean of its divisors is an integer number (250695).

Almost surely, 2^5551656 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 5551656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8022240).

5551656 is an abundant number, since it is smaller than the sum of its proper divisors (10492824).

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

5551656 is a wasteful number, since it uses less digits than its factorization.

5551656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274 (or 1270 counting only the distinct ones).

The product of its digits is 22500, while the sum is 33.

The square root of 5551656 is about 2356.1952380904. The cubic root of 5551656 is about 177.0683128698.

It can be divided in two parts, 555 and 1656, that added together give a triangular number (2211 = T₆₆).

The spelling of 5551656 in words is "five million, five hundred fifty-one thousand, six hundred fifty-six".