1966737128 has 8 divisors (see below), whose sum is σ = 3687632130. Its totient is φ = 983368560.

The previous prime is 1966737103. The next prime is 1966737161. The reversal of 1966737128 is 8217376691.

It can be written as a sum of positive squares in only one way, i.e., 1876449124 + 90288004 = 43318^2 + 9502^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122921063 + ... + 122921078.

Almost surely, 2^1966737128 is an apocalyptic number.

It is an amenable number.

1966737128 is a deficient number, since it is larger than the sum of its proper divisors (1720895002).

1966737128 is a wasteful number, since it uses less digits than its factorization.

1966737128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245842147 (or 245842143 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 1966737128 is about 44347.9100747713. The cubic root of 1966737128 is about 1252.8972004358.

The spelling of 1966737128 in words is "one billion, nine hundred sixty-six million, seven hundred thirty-seven thousand, one hundred twenty-eight".