1660161555516 has 24 divisors (see below), whose sum is σ = 3920381506944. Its totient is φ = 546719869360.

The previous prime is 1660161555511. The next prime is 1660161555523. The reversal of 1660161555516 is 6155551610661.

It is a super-2 number, since 2×1660161555516² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660161555511) 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, 833413440 + ... + 833415431.

It is an arithmetic number, because the mean of its divisors is an integer number (163349229456).

Almost surely, 2^{1660161555516} is an apocalyptic number.

It is an amenable number.

1660161555516 is an abundant number, since it is smaller than the sum of its proper divisors (2260219951428).

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

1660161555516 is a wasteful number, since it uses less digits than its factorization.

1660161555516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666828961 (or 1666828959 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 1660161555516 in words is "one trillion, six hundred sixty billion, one hundred sixty-one million, five hundred fifty-five thousand, five hundred sixteen".