166156650 has 192 divisors, whose sum is σ = 509967360. Its totient is φ = 39441600.

The previous prime is 166156633. The next prime is 166156651. The reversal of 166156650 is 56651661.

It is not an unprimeable number, because it can be changed into a prime (166156651) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 994867 + ... + 995033.

It is an arithmetic number, because the mean of its divisors is an integer number (2656080).

Almost surely, 2^166156650 is an apocalyptic number.

166156650 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 166156650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254983680).

166156650 is an abundant number, since it is smaller than the sum of its proper divisors (343810710).

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

166156650 is a wasteful number, since it uses less digits than its factorization.

166156650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 166156650 is about 12890.1764921975. The cubic root of 166156650 is about 549.7592886057.

It can be divided in two parts, 1661 and 56650, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 166156650 in words is "one hundred sixty-six million, one hundred fifty-six thousand, six hundred fifty".