1966311544 has 16 divisors (see below), whose sum is σ = 3687397920. Its totient is φ = 983005440.

The previous prime is 1966311521. The next prime is 1966311547. The reversal of 1966311544 is 4451136691.

It is a junction number, because it is equal to n+sod(n) for n = 1966311497 and 1966311506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966311547) 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, 52872 + ... + 82024.

It is an arithmetic number, because the mean of its divisors is an integer number (230462370).

Almost surely, 2^1966311544 is an apocalyptic number.

It is an amenable number.

1966311544 is a deficient number, since it is larger than the sum of its proper divisors (1721086376).

1966311544 is a wasteful number, since it uses less digits than its factorization.

1966311544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37590 (or 37586 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 1966311544 is about 44343.1115732760. Note that the first 3 decimals coincide. The cubic root of 1966311544 is about 1252.8068220692.

The spelling of 1966311544 in words is "one billion, nine hundred sixty-six million, three hundred eleven thousand, five hundred forty-four".