1966396933 has 4 divisors (see below), whose sum is σ = 1971301068. Its totient is φ = 1961492800.

The previous prime is 1966396921. The next prime is 1966396967. The reversal of 1966396933 is 3396936691.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1809821764 + 156575169 = 42542^2 + 12513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1966396933 is a prime.

It is a super-2 number, since 2×1966396933² = 7733433796223612978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966396903) 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, 2451466 + ... + 2452267.

It is an arithmetic number, because the mean of its divisors is an integer number (492825267).

Almost surely, 2^1966396933 is an apocalyptic number.

It is an amenable number.

1966396933 is a deficient number, since it is larger than the sum of its proper divisors (4904135).

1966396933 is an equidigital number, since it uses as much as digits as its factorization.

1966396933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4904134.

The product of its digits is 4251528, while the sum is 55.

The square root of 1966396933 is about 44344.0743842963. The cubic root of 1966396933 is about 1252.8249565934.

The spelling of 1966396933 in words is "one billion, nine hundred sixty-six million, three hundred ninety-six thousand, nine hundred thirty-three".