660894696 has 384 divisors, whose sum is σ = 2393763840. Its totient is φ = 159667200.

The previous prime is 660894691. The next prime is 660894697. The reversal of 660894696 is 696498066.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (660894691) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9053316 + ... + 9053388.

It is an arithmetic number, because the mean of its divisors is an integer number (6233760).

Almost surely, 2^660894696 is an apocalyptic number.

660894696 is a gapful number since it is divisible by the number (66) 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 660894696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1196881920).

660894696 is an abundant number, since it is smaller than the sum of its proper divisors (1732869144).

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

660894696 is a wasteful number, since it uses less digits than its factorization.

660894696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The square root of 660894696 is about 25707.8722573456. The cubic root of 660894696 is about 871.0520131528.

The spelling of 660894696 in words is "six hundred sixty million, eight hundred ninety-four thousand, six hundred ninety-six".