6601551655701 has 16 divisors (see below), whose sum is σ = 8905656988800. Its totient is φ = 4349447972928.

The previous prime is 6601551655651. The next prime is 6601551655729. The reversal of 6601551655701 is 1075561551066.

It is not a de Polignac number, because 6601551655701 - 2²³ = 6601543267093 is a prime.

It is a super-2 number, since 2×6601551655701² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601551655781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25821681 + ... + 26076086.

It is an arithmetic number, because the mean of its divisors is an integer number (556603561800).

Almost surely, 2^{6601551655701} is an apocalyptic number.

It is an amenable number.

6601551655701 is a deficient number, since it is larger than the sum of its proper divisors (2304105333099).

6601551655701 is a wasteful number, since it uses less digits than its factorization.

6601551655701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51898268.

The product of its (nonzero) digits is 945000, while the sum is 48.

The spelling of 6601551655701 in words is "six trillion, six hundred one billion, five hundred fifty-one million, six hundred fifty-five thousand, seven hundred one".