6665161110646 has 4 divisors (see below), whose sum is σ = 9997741665972. Its totient is φ = 3332580555322.

The previous prime is 6665161110611. The next prime is 6665161110653. The reversal of 6665161110646 is 6460111615666.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 6665161110646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1666290277660 + ... + 1666290277663.

It is an arithmetic number, because the mean of its divisors is an integer number (2499435416493).

Almost surely, 2^{6665161110646} is an apocalyptic number.

6665161110646 is a deficient number, since it is larger than the sum of its proper divisors (3332580555326).

6665161110646 is a wasteful number, since it uses less digits than its factorization.

6665161110646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332580555325.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 6665161110646 in words is "six trillion, six hundred sixty-five billion, one hundred sixty-one million, one hundred ten thousand, six hundred forty-six".