1660416 has 80 divisors (see below), whose sum is σ = 4713984. Its totient is φ = 518144.

The previous prime is 1660411. The next prime is 1660423. The reversal of 1660416 is 6140661.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35305 + ... + 35351.

2^1660416 is an apocalyptic number.

1660416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2356992).

1660416 is an abundant number, since it is smaller than the sum of its proper divisors (3053568).

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

1660416 is an equidigital number, since it uses as much as digits as its factorization.

1660416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1660416 is about 1288.5713018689. The cubic root of 1660416 is about 118.4147047721.

The spelling of 1660416 in words is "one million, six hundred sixty thousand, four hundred sixteen".