1066161066566 has 32 divisors (see below), whose sum is σ = 1608196464000. Its totient is φ = 530106869952.

The previous prime is 1066161066533. The next prime is 1066161066571. The reversal of 1066161066566 is 6656601616601.

It is a happy number.

It is a super-2 number, since 2×1066161066566² (a number of 25 digits) contains 22 as substring.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 489288065 + ... + 489290243.

It is an arithmetic number, because the mean of its divisors is an integer number (50256139500).

Almost surely, 2^{1066161066566} is an apocalyptic number.

1066161066566 is a deficient number, since it is larger than the sum of its proper divisors (542035397434).

1066161066566 is a wasteful number, since it uses less digits than its factorization.

1066161066566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 1066161066566 in words is "one trillion, sixty-six billion, one hundred sixty-one million, sixty-six thousand, five hundred sixty-six".