1966975743 has 8 divisors (see below), whose sum is σ = 2623017856. Its totient is φ = 1311125400.

The previous prime is 1966975727. The next prime is 1966975753. The reversal of 1966975743 is 3475796691.

It is a happy number.

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

It is not a de Polignac number, because 1966975743 - 2⁴ = 1966975727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966975753) 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, 22003 + ... + 66468.

It is an arithmetic number, because the mean of its divisors is an integer number (327877232).

Almost surely, 2^1966975743 is an apocalyptic number.

1966975743 is a deficient number, since it is larger than the sum of its proper divisors (656042113).

1966975743 is an equidigital number, since it uses as much as digits as its factorization.

1966975743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95885.

The product of its digits is 8573040, while the sum is 57.

The square root of 1966975743 is about 44350.6002552389. The cubic root of 1966975743 is about 1252.9478677689.

The spelling of 1966975743 in words is "one billion, nine hundred sixty-six million, nine hundred seventy-five thousand, seven hundred forty-three".