1071666 has 24 divisors (see below), whose sum is σ = 2403180. Its totient is φ = 344736.

The previous prime is 1071661. The next prime is 1071671. The reversal of 1071666 is 6661701.

It is an interprime number because it is at equal distance from previous prime (1071661) and next prime (1071671).

It can be written as a sum of positive squares in 2 ways, for example, as 1071225 + 441 = 1035^2 + 21^2 .

It is a super-2 number, since 2×1071666² = 2296936031112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1071661) 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, 505 + ... + 1548.

2^1071666 is an apocalyptic number.

1071666 is an abundant number, since it is smaller than the sum of its proper divisors (1331514).

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

1071666 is a wasteful number, since it uses less digits than its factorization.

1071666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1071666 is about 1035.2130215564. The cubic root of 1071666 is about 102.3339687620. Note that the first 3 decimals are identical.

The spelling of 1071666 in words is "one million, seventy-one thousand, six hundred sixty-six".