1966584941 has 4 divisors (see below), whose sum is σ = 1973841984. Its totient is φ = 1959327900.

The previous prime is 1966584937. The next prime is 1966584943. The reversal of 1966584941 is 1494856691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1494856691 = 257 ⋅5816563.

It is a cyclic number.

It is not a de Polignac number, because 1966584941 - 2² = 1966584937 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 (1966584943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3628115 + ... + 3628656.

It is an arithmetic number, because the mean of its divisors is an integer number (493460496).

Almost surely, 2^1966584941 is an apocalyptic number.

It is an amenable number.

1966584941 is a deficient number, since it is larger than the sum of its proper divisors (7257043).

1966584941 is an equidigital number, since it uses as much as digits as its factorization.

1966584941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7257042.

The product of its digits is 1866240, while the sum is 53.

The square root of 1966584941 is about 44346.1942110030. The cubic root of 1966584941 is about 1252.8648830200.

The spelling of 1966584941 in words is "one billion, nine hundred sixty-six million, five hundred eighty-four thousand, nine hundred forty-one".