166765950 has 144 divisors (see below), whose sum is σ = 499655520. Its totient is φ = 39594240.

The previous prime is 166765943. The next prime is 166765969. The reversal of 166765950 is 59567661.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 166765896 and 166765905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 169159 + ... + 170141.

It is an arithmetic number, because the mean of its divisors is an integer number (3469830).

Almost surely, 2^166765950 is an apocalyptic number.

166765950 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 166765950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249827760).

166765950 is an abundant number, since it is smaller than the sum of its proper divisors (332889570).

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

166765950 is a wasteful number, since it uses less digits than its factorization.

166765950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 166765950 is about 12913.7891418437. The cubic root of 166765950 is about 550.4304619057.

The spelling of 166765950 in words is "one hundred sixty-six million, seven hundred sixty-five thousand, nine hundred fifty".