6665161110645 has 8 divisors (see below), whose sum is σ = 10664257777056. Its totient is φ = 3554752592336.

The previous prime is 6665161110611. The next prime is 6665161110653. The reversal of 6665161110645 is 5460111615666.

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 6665161110645 - 2¹⁴ = 6665161094261 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6665161110594 and 6665161110603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222172037007 + ... + 222172037036.

It is an arithmetic number, because the mean of its divisors is an integer number (1333032222132).

Almost surely, 2^{6665161110645} is an apocalyptic number.

It is an amenable number.

6665161110645 is a deficient number, since it is larger than the sum of its proper divisors (3999096666411).

6665161110645 is a wasteful number, since it uses less digits than its factorization.

6665161110645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444344074051.

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 6665161110645 in words is "six trillion, six hundred sixty-five billion, one hundred sixty-one million, one hundred ten thousand, six hundred forty-five".