1966742033 has 4 divisors (see below), whose sum is σ = 1975561728. Its totient is φ = 1957922340.

The previous prime is 1966742017. The next prime is 1966742059. The reversal of 1966742033 is 3302476691.

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: 3302476691 = 4079 ⋅809629.

It is a cyclic number.

It is not a de Polignac number, because 1966742033 - 2⁴ = 1966742017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1966742093) 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, 4409513 + ... + 4409958.

It is an arithmetic number, because the mean of its divisors is an integer number (493890432).

Almost surely, 2^1966742033 is an apocalyptic number.

It is an amenable number.

1966742033 is a deficient number, since it is larger than the sum of its proper divisors (8819695).

1966742033 is an equidigital number, since it uses as much as digits as its factorization.

1966742033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8819694.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 1966742033 is about 44347.9653761027. The cubic root of 1966742033 is about 1252.8982420011.

The spelling of 1966742033 in words is "one billion, nine hundred sixty-six million, seven hundred forty-two thousand, thirty-three".