166209241950 has 576 divisors, whose sum is σ = 502287851520. Its totient is φ = 40777344000.

The previous prime is 166209241943. The next prime is 166209241967. The reversal of 166209241950 is 59142902661.

166209241950 is a `hidden beast` number, since 1 + 6 + 620 + 9 + 2 + 4 + 19 + 5 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 166209241896 and 166209241905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 725804436 + ... + 725804664.

It is an arithmetic number, because the mean of its divisors is an integer number (872027520).

Almost surely, 2^166209241950 is an apocalyptic number.

166209241950 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 166209241950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251143925760).

166209241950 is an abundant number, since it is smaller than the sum of its proper divisors (336078609570).

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

166209241950 is a wasteful number, since it uses less digits than its factorization.

166209241950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 166209241950 in words is "one hundred sixty-six billion, two hundred nine million, two hundred forty-one thousand, nine hundred fifty".