661683084 has 24 divisors (see below), whose sum is σ = 1544727408. Its totient is φ = 220446720.

The previous prime is 661683059. The next prime is 661683103. The reversal of 661683084 is 480386166.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11724 + ... + 38220.

It is an arithmetic number, because the mean of its divisors is an integer number (64363642).

Almost surely, 2^661683084 is an apocalyptic number.

It is an amenable number.

661683084 is an abundant number, since it is smaller than the sum of its proper divisors (883044324).

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

661683084 is a wasteful number, since it uses less digits than its factorization.

661683084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28585 (or 28583 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 661683084 is about 25723.2012782235. The cubic root of 661683084 is about 871.3982377842.

The spelling of 661683084 in words is "six hundred sixty-one million, six hundred eighty-three thousand, eighty-four".