166616066650 has 48 divisors (see below), whose sum is σ = 338127956640. Its totient is φ = 60578913600.

The previous prime is 166616066647. The next prime is 166616066651. The reversal of 166616066650 is 56660616661.

It is a junction number, because it is equal to n+sod(n) for n = 166616066594 and 166616066603.

It is not an unprimeable number, because it can be changed into a prime (166616066651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4728397 + ... + 4763503.

It is an arithmetic number, because the mean of its divisors is an integer number (7044332430).

Almost surely, 2^166616066650 is an apocalyptic number.

166616066650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166616066650 is an abundant number, since it is smaller than the sum of its proper divisors (171511889990).

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

166616066650 is a wasteful number, since it uses less digits than its factorization.

166616066650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43759 (or 43754 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 166616066650 in words is "one hundred sixty-six billion, six hundred sixteen million, sixty-six thousand, six hundred fifty".