1966969345 has 24 divisors (see below), whose sum is σ = 2609584488. Its totient is φ = 1422178560.

The previous prime is 1966969307. The next prime is 1966969349. The reversal of 1966969345 is 5439696691.

It can be written as a sum of positive squares in 4 ways, for example, as 780029041 + 1186940304 = 27929^2 + 34452^2 .

It is not a de Polignac number, because 1966969345 - 2¹³ = 1966961153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1966969345.

It is not an unprimeable number, because it can be changed into a prime (1966969349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95269 + ... + 114061.

It is an arithmetic number, because the mean of its divisors is an integer number (108732687).

Almost surely, 2^1966969345 is an apocalyptic number.

It is an amenable number.

1966969345 is a deficient number, since it is larger than the sum of its proper divisors (642615143).

1966969345 is a wasteful number, since it uses less digits than its factorization.

1966969345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18993 (or 18982 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 58.

The square root of 1966969345 is about 44350.5281253786. The cubic root of 1966969345 is about 1252.9465092758.

The spelling of 1966969345 in words is "one billion, nine hundred sixty-six million, nine hundred sixty-nine thousand, three hundred forty-five".