1966889126 has 8 divisors (see below), whose sum is σ = 2950651704. Its totient is φ = 983338560.

The previous prime is 1966889123. The next prime is 1966889129. The reversal of 1966889126 is 6219886691.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1966889123) and next prime (1966889129).

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966889123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27320 + ... + 68411.

It is an arithmetic number, because the mean of its divisors is an integer number (368831463).

Almost surely, 2^1966889126 is an apocalyptic number.

1966889126 is a deficient number, since it is larger than the sum of its proper divisors (983762578).

1966889126 is a wasteful number, since it uses less digits than its factorization.

1966889126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106006.

The product of its digits is 2239488, while the sum is 56.

The square root of 1966889126 is about 44349.6237413577. The cubic root of 1966889126 is about 1252.9294760528.

The spelling of 1966889126 in words is "one billion, nine hundred sixty-six million, eight hundred eighty-nine thousand, one hundred twenty-six".