6601667321 has 8 divisors (see below), whose sum is σ = 6783469440. Its totient is φ = 6421150512.

The previous prime is 6601667309. The next prime is 6601667351. The reversal of 6601667321 is 1237661066.

It is a happy number.

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 6601667321 - 2⁶ = 6601667257 is a prime.

It is a super-2 number, since 2×6601667321² = 87164022834318634082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6601667351) 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, 310910 + ... + 331463.

It is an arithmetic number, because the mean of its divisors is an integer number (847933680).

Almost surely, 2^6601667321 is an apocalyptic number.

It is an amenable number.

6601667321 is a deficient number, since it is larger than the sum of its proper divisors (181802119).

6601667321 is a wasteful number, since it uses less digits than its factorization.

6601667321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642655.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 6601667321 is about 81250.6450497471. The cubic root of 6601667321 is about 1875.9353977819.

The spelling of 6601667321 in words is "six billion, six hundred one million, six hundred sixty-seven thousand, three hundred twenty-one".