1066161666516 has 48 divisors (see below), whose sum is σ = 2634666793920. Its totient is φ = 334403320320.

The previous prime is 1066161666511. The next prime is 1066161666517. The reversal of 1066161666516 is 6156661616601.

It is a super-2 number, since 2×1066161666516² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066161666511) 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, 255975 + ... + 1482513.

It is an arithmetic number, because the mean of its divisors is an integer number (54888891540).

Almost surely, 2^{1066161666516} is an apocalyptic number.

It is an amenable number.

1066161666516 is an abundant number, since it is smaller than the sum of its proper divisors (1568505127404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1066161666516 is a wasteful number, since it uses less digits than its factorization.

1066161666516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230824 (or 1230822 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 1066161666516 in words is "one trillion, sixty-six billion, one hundred sixty-one million, six hundred sixty-six thousand, five hundred sixteen".