1660870 has 16 divisors (see below), whose sum is σ = 3004848. Its totient is φ = 660960.

The previous prime is 1660843. The next prime is 1660871. The reversal of 1660870 is 780661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660871) 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, 2800 + ... + 3340.

It is an arithmetic number, because the mean of its divisors is an integer number (187803).

2^1660870 is an apocalyptic number.

1660870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1660870 is a deficient number, since it is larger than the sum of its proper divisors (1343978).

1660870 is a wasteful number, since it uses less digits than its factorization.

1660870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1660870 is about 1288.7474539257. The cubic root of 1660870 is about 118.4254963201.

The spelling of 1660870 in words is "one million, six hundred sixty thousand, eight hundred seventy".