6664161601 has 8 divisors (see below), whose sum is σ = 6799495104. Its totient is φ = 6529980240.

The previous prime is 6664161589. The next prime is 6664161701. The reversal of 6664161601 is 1061614666.

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 6664161601 - 2⁹ = 6664161089 is a prime.

It is a super-2 number, since 2×6664161601² = 88822099688485766402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6664161701) 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, 276346 + ... + 299491.

It is an arithmetic number, because the mean of its divisors is an integer number (849936888).

Almost surely, 2^6664161601 is an apocalyptic number.

It is an amenable number.

6664161601 is a deficient number, since it is larger than the sum of its proper divisors (135333503).

6664161601 is a wasteful number, since it uses less digits than its factorization.

6664161601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576071.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 6664161601 is about 81634.3163197929. The cubic root of 6664161601 is about 1881.8362925245.

The spelling of 6664161601 in words is "six billion, six hundred sixty-four million, one hundred sixty-one thousand, six hundred one".