6621999231 has 8 divisors (see below), whose sum is σ = 8834120064. Its totient is φ = 4412272280.

The previous prime is 6621999179. The next prime is 6621999259. The reversal of 6621999231 is 1329991266.

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 6621999231 - 2¹⁹ = 6621474943 is a prime.

It is a super-2 number, since 2×6621999231² = 87701747630729182722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621999031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592005 + ... + 603086.

It is an arithmetic number, because the mean of its divisors is an integer number (1104265008).

Almost surely, 2^6621999231 is an apocalyptic number.

6621999231 is a deficient number, since it is larger than the sum of its proper divisors (2212120833).

6621999231 is a wasteful number, since it uses less digits than its factorization.

6621999231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196941.

The product of its digits is 314928, while the sum is 48.

The square root of 6621999231 is about 81375.6673152362. The cubic root of 6621999231 is about 1877.8592683531.

The spelling of 6621999231 in words is "six billion, six hundred twenty-one million, nine hundred ninety-nine thousand, two hundred thirty-one".