6221407957 has 8 divisors (see below), whose sum is σ = 6451592576. Its totient is φ = 5994488592.

The previous prime is 6221407939. The next prime is 6221407963. The reversal of 6221407957 is 7597041226.

6221407957 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6221407957 - 2¹¹ = 6221405909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221407967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812433 + ... + 820054.

It is an arithmetic number, because the mean of its divisors is an integer number (806449072).

Almost surely, 2^6221407957 is an apocalyptic number.

It is an amenable number.

6221407957 is a deficient number, since it is larger than the sum of its proper divisors (230184619).

6221407957 is a wasteful number, since it uses less digits than its factorization.

6221407957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632627.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 6221407957 is about 78875.9022579140. The cubic root of 6221407957 is about 1839.2025487537.

The spelling of 6221407957 in words is "six billion, two hundred twenty-one million, four hundred seven thousand, nine hundred fifty-seven".