159451866 has 96 divisors (see below), whose sum is σ = 407721600. Its totient is φ = 44098560.

The previous prime is 159451843. The next prime is 159451909. The reversal of 159451866 is 668154951.

159451866 is a `hidden beast` number, since 1 + 594 + 51 + 8 + 6 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 661506 + ... + 661746.

It is an arithmetic number, because the mean of its divisors is an integer number (4247100).

Almost surely, 2^159451866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 159451866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203860800).

159451866 is an abundant number, since it is smaller than the sum of its proper divisors (248269734).

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

159451866 is a wasteful number, since it uses less digits than its factorization.

159451866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 401 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 159451866 is about 12627.4251532131. The cubic root of 159451866 is about 542.2628704491.

The spelling of 159451866 in words is "one hundred fifty-nine million, four hundred fifty-one thousand, eight hundred sixty-six".