5721905667 has 4 divisors (see below), whose sum is σ = 7629207560. Its totient is φ = 3814603776.

The previous prime is 5721905647. The next prime is 5721905669. The reversal of 5721905667 is 7665091275.

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

It is not a de Polignac number, because 5721905667 - 2⁸ = 5721905411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5721905669) 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, 953650942 + ... + 953650947.

It is an arithmetic number, because the mean of its divisors is an integer number (1907301890).

Almost surely, 2^5721905667 is an apocalyptic number.

5721905667 is a deficient number, since it is larger than the sum of its proper divisors (1907301893).

5721905667 is a wasteful number, since it uses less digits than its factorization.

5721905667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907301892.

The product of its (nonzero) digits is 793800, while the sum is 48.

The square root of 5721905667 is about 75643.2790603369. The cubic root of 5721905667 is about 1788.6013925349.

The spelling of 5721905667 in words is "five billion, seven hundred twenty-one million, nine hundred five thousand, six hundred sixty-seven".