166553341450650 has 1536 divisors, whose sum is σ = 610744418426880. Its totient is φ = 32310835200000.

The previous prime is 166553341450607. The next prime is 166553341450663. The reversal of 166553341450650 is 56054143355661.

166553341450650 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 53 + 34 + 1 + 4 + 506 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 767 ways as a sum of consecutive naturals, for example, 156977701120 + ... + 156977702180.

It is an arithmetic number, because the mean of its divisors is an integer number (397620064080).

Almost surely, 2^{166553341450650} is an apocalyptic number.

166553341450650 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 166553341450650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305372209213440).

166553341450650 is an abundant number, since it is smaller than the sum of its proper divisors (444191076976230).

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

166553341450650 is a wasteful number, since it uses less digits than its factorization.

166553341450650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 54.

The spelling of 166553341450650 in words is "one hundred sixty-six trillion, five hundred fifty-three billion, three hundred forty-one million, four hundred fifty thousand, six hundred fifty".