6617661201 has 20 divisors (see below), whose sum is σ = 9927033600. Its totient is φ = 4393301976.

The previous prime is 6617661137. The next prime is 6617661209. The reversal of 6617661201 is 1021667166.

It is not a de Polignac number, because 6617661201 - 2⁶ = 6617661137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6617661209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 151561 + ... + 190278.

It is an arithmetic number, because the mean of its divisors is an integer number (496351680).

Almost surely, 2^6617661201 is an apocalyptic number.

It is an amenable number.

6617661201 is a deficient number, since it is larger than the sum of its proper divisors (3309372399).

6617661201 is a wasteful number, since it uses less digits than its factorization.

6617661201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342090 (or 342081 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 6617661201 is about 81349.0086048994. The cubic root of 6617661201 is about 1877.4491208509.

The spelling of 6617661201 in words is "six billion, six hundred seventeen million, six hundred sixty-one thousand, two hundred one".