5421664667705 has 32 divisors (see below), whose sum is σ = 7644579949440. Its totient is φ = 3639161710080.

The previous prime is 5421664667701. The next prime is 5421664667717. The reversal of 5421664667705 is 5077664661245.

It is a happy number.

5421664667705 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5421664667705 - 2² = 5421664667701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5421664667701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4119674 + ... + 5273996.

It is an arithmetic number, because the mean of its divisors is an integer number (238893123420).

Almost surely, 2^{5421664667705} is an apocalyptic number.

5421664667705 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5421664667705 is a deficient number, since it is larger than the sum of its proper divisors (2222915281735).

5421664667705 is a wasteful number, since it uses less digits than its factorization.

5421664667705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160921.

The product of its (nonzero) digits is 50803200, while the sum is 59.

The spelling of 5421664667705 in words is "five trillion, four hundred twenty-one billion, six hundred sixty-four million, six hundred sixty-seven thousand, seven hundred five".