661167468 has 96 divisors (see below), whose sum is σ = 1954653120. Its totient is φ = 191462400.

The previous prime is 661167443. The next prime is 661167503. The reversal of 661167468 is 864761166.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10018 + ... + 37718.

It is an arithmetic number, because the mean of its divisors is an integer number (20360970).

Almost surely, 2^661167468 is an apocalyptic number.

661167468 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661167468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (977326560).

661167468 is an abundant number, since it is smaller than the sum of its proper divisors (1293485652).

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

661167468 is a wasteful number, since it uses less digits than its factorization.

661167468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27744 (or 27736 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 661167468 is about 25713.1769332379. The cubic root of 661167468 is about 871.1718335117.

The spelling of 661167468 in words is "six hundred sixty-one million, one hundred sixty-seven thousand, four hundred sixty-eight".