1066616161 has 16 divisors (see below), whose sum is σ = 1178210880. Its totient is φ = 959353920.

The previous prime is 1066616123. The next prime is 1066616197. The reversal of 1066616161 is 1616166601.

It is a cyclic number.

It is not a de Polignac number, because 1066616161 - 2²⁷ = 932398433 is a prime.

It is a super-2 number, since 2×1066616161² = 2275340069812755842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066616561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255630 + ... + 259768.

It is an arithmetic number, because the mean of its divisors is an integer number (73638180).

Almost surely, 2^1066616161 is an apocalyptic number.

It is an amenable number.

1066616161 is a deficient number, since it is larger than the sum of its proper divisors (111594719).

1066616161 is a wasteful number, since it uses less digits than its factorization.

1066616161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1066616161 is about 32659.0900210033. The cubic root of 1066616161 is about 1021.7297833666.

The spelling of 1066616161 in words is "one billion, sixty-six million, six hundred sixteen thousand, one hundred sixty-one".