5661213345 has 24 divisors (see below), whose sum is σ = 9859292352. Its totient is φ = 3004999200.

The previous prime is 5661213323. The next prime is 5661213359. The reversal of 5661213345 is 5433121665.

5661213345 is a `hidden beast` number, since 5 + 6 + 612 + 1 + 3 + 34 + 5 = 666.

It is not a de Polignac number, because 5661213345 - 2⁶ = 5661213281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288621 + ... + 307610.

It is an arithmetic number, because the mean of its divisors is an integer number (410803848).

Almost surely, 2^5661213345 is an apocalyptic number.

It is an amenable number.

5661213345 is a deficient number, since it is larger than the sum of its proper divisors (4198079007).

5661213345 is a wasteful number, since it uses less digits than its factorization.

5661213345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596453 (or 596450 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 5661213345 is about 75241.0349809198. The cubic root of 5661213345 is about 1782.2549951203.

The spelling of 5661213345 in words is "five billion, six hundred sixty-one million, two hundred thirteen thousand, three hundred forty-five".