1966256426 has 4 divisors (see below), whose sum is σ = 2949384642. Its totient is φ = 983128212.

The previous prime is 1966256423. The next prime is 1966256443. The reversal of 1966256426 is 6246526691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1112155801 + 854100625 = 33349^2 + 29225^2 .

It is not an unprimeable number, because it can be changed into a prime (1966256423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491564105 + ... + 491564108.

Almost surely, 2^1966256426 is an apocalyptic number.

1966256426 is a deficient number, since it is larger than the sum of its proper divisors (983128216).

1966256426 is an equidigital number, since it uses as much as digits as its factorization.

1966256426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983128215.

The product of its digits is 933120, while the sum is 47.

The square root of 1966256426 is about 44342.4900744196. The cubic root of 1966256426 is about 1252.7951160822.

The spelling of 1966256426 in words is "one billion, nine hundred sixty-six million, two hundred fifty-six thousand, four hundred twenty-six".