6693409945 has 4 divisors (see below), whose sum is σ = 8032091940. Its totient is φ = 5354727952.

The previous prime is 6693409939. The next prime is 6693409951. The reversal of 6693409945 is 5499043966.

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

It is an interprime number because it is at equal distance from previous prime (6693409939) and next prime (6693409951).

It can be written as a sum of positive squares in 2 ways, for example, as 1313627536 + 5379782409 = 36244^2 + 73347^2 .

It is a cyclic number.

It is not a de Polignac number, because 6693409945 - 2²³ = 6685021337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669340990 + ... + 669340999.

It is an arithmetic number, because the mean of its divisors is an integer number (2008022985).

Almost surely, 2^6693409945 is an apocalyptic number.

It is an amenable number.

6693409945 is a deficient number, since it is larger than the sum of its proper divisors (1338681995).

6693409945 is a wasteful number, since it uses less digits than its factorization.

6693409945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338681994.

The product of its (nonzero) digits is 6298560, while the sum is 55.

The square root of 6693409945 is about 81813.2626473239. The cubic root of 6693409945 is about 1884.5853389272.

The spelling of 6693409945 in words is "six billion, six hundred ninety-three million, four hundred nine thousand, nine hundred forty-five".