166066650 has 72 divisors (see below), whose sum is σ = 469672320. Its totient is φ = 41951520.

The previous prime is 166066643. The next prime is 166066697. The reversal of 166066650 is 56660661.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1162 + ... + 18261.

Almost surely, 2^166066650 is an apocalyptic number.

166066650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166066650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234836160).

166066650 is an abundant number, since it is smaller than the sum of its proper divisors (303605670).

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

166066650 is a wasteful number, since it uses less digits than its factorization.

166066650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19460 (or 19452 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 166066650 is about 12886.6849887781. The cubic root of 166066650 is about 549.6600102598.

The spelling of 166066650 in words is "one hundred sixty-six million, sixty-six thousand, six hundred fifty".