1660267 has 12 divisors (see below), whose sum is σ = 1995456. Its totient is φ = 1375920.

The previous prime is 1660261. The next prime is 1660283. The reversal of 1660267 is 7620661.

It is not a de Polignac number, because 1660267 - 2³ = 1660259 is a prime.

It is a super-2 number, since 2×1660267² = 5512973022578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 973 + ... + 2065.

It is an arithmetic number, because the mean of its divisors is an integer number (166288).

2^1660267 is an apocalyptic number.

1660267 is a deficient number, since it is larger than the sum of its proper divisors (335189).

1660267 is a wasteful number, since it uses less digits than its factorization.

1660267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1660267 is about 1288.5134846015. The cubic root of 1660267 is about 118.4111626239.

The spelling of 1660267 in words is "one million, six hundred sixty thousand, two hundred sixty-seven".