6665161556005 has 8 divisors (see below), whose sum is σ = 8051162039424. Its totient is φ = 5296817130000.

The previous prime is 6665161555993. The next prime is 6665161556023. The reversal of 6665161556005 is 5006551615666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6665161556005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 4414013521 + ... + 4414015030.

It is an arithmetic number, because the mean of its divisors is an integer number (1006395254928).

Almost surely, 2^{6665161556005} is an apocalyptic number.

It is an amenable number.

6665161556005 is a deficient number, since it is larger than the sum of its proper divisors (1386000483419).

6665161556005 is a wasteful number, since it uses less digits than its factorization.

6665161556005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8828028707.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 6665161556005 in words is "six trillion, six hundred sixty-five billion, one hundred sixty-one million, five hundred fifty-six thousand, five".