7661571343 has 4 divisors (see below), whose sum is σ = 8064811960. Its totient is φ = 7258330728.

The previous prime is 7661571341. The next prime is 7661571367. The reversal of 7661571343 is 3431751667.

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

It is a cyclic number.

It is not a de Polignac number, because 7661571343 - 2¹ = 7661571341 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 7661571343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661571341) 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, 201620280 + ... + 201620317.

It is an arithmetic number, because the mean of its divisors is an integer number (2016202990).

Almost surely, 2^7661571343 is an apocalyptic number.

7661571343 is a deficient number, since it is larger than the sum of its proper divisors (403240617).

7661571343 is a wasteful number, since it uses less digits than its factorization.

7661571343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403240616.

The product of its digits is 317520, while the sum is 43.

The square root of 7661571343 is about 87530.4023925402. The cubic root of 7661571343 is about 1971.3903060778.

The spelling of 7661571343 in words is "seven billion, six hundred sixty-one million, five hundred seventy-one thousand, three hundred forty-three".