4271666621 has 8 divisors (see below), whose sum is σ = 4651543200. Its totient is φ = 3907295280.

The previous prime is 4271666603. The next prime is 4271666627. The reversal of 4271666621 is 1266661724.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-4271666621 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 (4271666627) 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, 3875735 + ... + 3876836.

It is an arithmetic number, because the mean of its divisors is an integer number (581442900).

Almost surely, 2^4271666621 is an apocalyptic number.

It is an amenable number.

4271666621 is a deficient number, since it is larger than the sum of its proper divisors (379876579).

4271666621 is a wasteful number, since it uses less digits than its factorization.

4271666621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752619.

The product of its digits is 145152, while the sum is 41.

The square root of 4271666621 is about 65357.9881957822. The cubic root of 4271666621 is about 1622.5538417543.

The spelling of 4271666621 in words is "four billion, two hundred seventy-one million, six hundred sixty-six thousand, six hundred twenty-one".