1566440066161 has 8 divisors (see below), whose sum is σ = 1567807200000. Its totient is φ = 1565073519840.

The previous prime is 1566440066143. The next prime is 1566440066197. The reversal of 1566440066161 is 1616600446651.

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 1566440066161 - 2⁷ = 1566440066033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1566440066141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5274765 + ... + 5563813.

It is an arithmetic number, because the mean of its divisors is an integer number (195975900000).

Almost surely, 2^{1566440066161} is an apocalyptic number.

It is an amenable number.

1566440066161 is a deficient number, since it is larger than the sum of its proper divisors (1367133839).

1566440066161 is a wasteful number, since it uses less digits than its factorization.

1566440066161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293759.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 1566440066161 in words is "one trillion, five hundred sixty-six billion, four hundred forty million, sixty-six thousand, one hundred sixty-one".