6446616 has 32 divisors (see below), whose sum is σ = 17582400. Its totient is φ = 1953440.

The previous prime is 6446611. The next prime is 6446623. The reversal of 6446616 is 6166446.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11946 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (549450).

Almost surely, 2^6446616 is an apocalyptic number.

6446616 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6446616 is an abundant number, since it is smaller than the sum of its proper divisors (11135784).

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

6446616 is a wasteful number, since it uses less digits than its factorization.

6446616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24439 (or 24435 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 6446616 is about 2539.0187080839. The cubic root of 6446616 is about 186.1132389417.

It can be divided in two parts, 644 and 6616, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 6446616 in words is "six million, four hundred forty-six thousand, six hundred sixteen".