166500250501650 has 288 divisors, whose sum is σ = 473499664046208. Its totient is φ = 38568028262400.

The previous prime is 166500250501643. The next prime is 166500250501807. The reversal of 166500250501650 is 56105052005661.

It is a super-2 number, since 2×166500250501650² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3312687520 + ... + 3312737780.

It is an arithmetic number, because the mean of its divisors is an integer number (1644096055716).

Almost surely, 2^{166500250501650} is an apocalyptic number.

166500250501650 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 166500250501650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236749832023104).

166500250501650 is an abundant number, since it is smaller than the sum of its proper divisors (306999413544558).

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

166500250501650 is a wasteful number, since it uses less digits than its factorization.

166500250501650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58006 (or 57988 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 166500250501650 in words is "one hundred sixty-six trillion, five hundred billion, two hundred fifty million, five hundred one thousand, six hundred fifty".