1956666 has 16 divisors (see below), whose sum is σ = 4143744. Its totient is φ = 613824.

The previous prime is 1956653. The next prime is 1956667. The reversal of 1956666 is 6666591.

It is not an unprimeable number, because it can be changed into a prime (1956667) 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, 9490 + ... + 9693.

It is an arithmetic number, because the mean of its divisors is an integer number (258984).

2^1956666 is an apocalyptic number.

1956666 is an abundant number, since it is smaller than the sum of its proper divisors (2187078).

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

1956666 is a wasteful number, since it uses less digits than its factorization.

1956666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19205.

The product of its digits is 58320, while the sum is 39.

The square root of 1956666 is about 1398.8087789258. The cubic root of 1956666 is about 125.0754957273.

The spelling of 1956666 in words is "one million, nine hundred fifty-six thousand, six hundred sixty-six".