6551980 has 12 divisors (see below), whose sum is σ = 13759200. Its totient is φ = 2620784.

The previous prime is 6551959. The next prime is 6551983. The reversal of 6551980 is 891556.

It is not an unprimeable number, because it can be changed into a prime (6551983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163780 + ... + 163819.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^6551980 is an apocalyptic number.

It is an amenable number.

6551980 is an abundant number, since it is smaller than the sum of its proper divisors (7207220).

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

6551980 is a wasteful number, since it uses less digits than its factorization.

6551980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327608 (or 327606 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 6551980 is about 2559.6835741943. The cubic root of 6551980 is about 187.1217143501.

It can be divided in two parts, 65 and 51980, that multiplied together give a triangular number (3378700 = T₂₅₉₉).

The spelling of 6551980 in words is "six million, five hundred fifty-one thousand, nine hundred eighty".