1959666 has 8 divisors (see below), whose sum is σ = 3919344. Its totient is φ = 653220.

The previous prime is 1959649. The next prime is 1959673. The reversal of 1959666 is 6669591.

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

1959666 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163300 + ... + 163311.

It is an arithmetic number, because the mean of its divisors is an integer number (489918).

2^1959666 is an apocalyptic number.

1959666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1959666 is a wasteful number, since it uses less digits than its factorization.

1959666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326616.

The product of its digits is 87480, while the sum is 42.

The square root of 1959666 is about 1399.8807092035. The cubic root of 1959666 is about 125.1393858482.

It can be divided in two parts, 19 and 59666, that added together give a triangular number (59685 = T₃₄₅).

The spelling of 1959666 in words is "one million, nine hundred fifty-nine thousand, six hundred sixty-six".