1566417065161 has 8 divisors (see below), whose sum is σ = 1722802402944. Its totient is φ = 1415159115600.

The previous prime is 1566417065137. The next prime is 1566417065207. The reversal of 1566417065161 is 1615607146651.

It is a happy number.

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 1566417065161 - 2⁹ = 1566417064649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1566417066161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281846415 + ... + 1281847636.

It is an arithmetic number, because the mean of its divisors is an integer number (215350300368).

Almost surely, 2^{1566417065161} is an apocalyptic number.

It is an amenable number.

1566417065161 is a deficient number, since it is larger than the sum of its proper divisors (156385337783).

1566417065161 is a wasteful number, since it uses less digits than its factorization.

1566417065161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563694111.

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 1566417065161 in words is "one trillion, five hundred sixty-six billion, four hundred seventeen million, sixty-five thousand, one hundred sixty-one".