661610092 has 72 divisors (see below), whose sum is σ = 1390779936. Its totient is φ = 273504000.

The previous prime is 661610017. The next prime is 661610107. The reversal of 661610092 is 290016166.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 445992 + ... + 447472.

It is an arithmetic number, because the mean of its divisors is an integer number (19316388).

Almost surely, 2^661610092 is an apocalyptic number.

It is an amenable number.

661610092 is an abundant number, since it is smaller than the sum of its proper divisors (729169844).

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

661610092 is a wasteful number, since it uses less digits than its factorization.

661610092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 661610092 is about 25721.7824421248. The cubic root of 661610092 is about 871.3661945293.

The spelling of 661610092 in words is "six hundred sixty-one million, six hundred ten thousand, ninety-two".