661108084 has 48 divisors (see below), whose sum is σ = 1426096000. Its totient is φ = 261138816.

The previous prime is 661108081. The next prime is 661108117. The reversal of 661108084 is 480801166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661108081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388267 + ... + 389965.

Almost surely, 2^661108084 is an apocalyptic number.

It is an amenable number.

661108084 is an abundant number, since it is smaller than the sum of its proper divisors (764987916).

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

661108084 is a wasteful number, since it uses less digits than its factorization.

661108084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792 (or 2790 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 661108084 is about 25712.0221686277. The cubic root of 661108084 is about 871.1457507518.

The spelling of 661108084 in words is "six hundred sixty-one million, one hundred eight thousand, eighty-four".