1660771 has 8 divisors (see below), whose sum is σ = 1998080. Its totient is φ = 1348488.

The previous prime is 1660751. The next prime is 1660783. The reversal of 1660771 is 1770661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1660771 - 2⁵ = 1660739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1660721) 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, 6111 + ... + 6376.

It is an arithmetic number, because the mean of its divisors is an integer number (249760).

2^1660771 is an apocalyptic number.

1660771 is a deficient number, since it is larger than the sum of its proper divisors (337309).

1660771 is a wasteful number, since it uses less digits than its factorization.

1660771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12513.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 1660771 is about 1288.7090439661. The cubic root of 1660771 is about 118.4231432648.

The spelling of 1660771 in words is "one million, six hundred sixty thousand, seven hundred seventy-one".