661055748 has 24 divisors (see below), whose sum is σ = 1545644352. Its totient is φ = 219897504.

The previous prime is 661055729. The next prime is 661055753. The reversal of 661055748 is 847550166.

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, 50715 + ... + 62402.

It is an arithmetic number, because the mean of its divisors is an integer number (64401848).

Almost surely, 2^661055748 is an apocalyptic number.

It is an amenable number.

661055748 is an abundant number, since it is smaller than the sum of its proper divisors (884588604).

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

661055748 is a wasteful number, since it uses less digits than its factorization.

661055748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113611 (or 113609 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 661055748 is about 25711.0044144526. The cubic root of 661055748 is about 871.1227623337.

The spelling of 661055748 in words is "six hundred sixty-one million, fifty-five thousand, seven hundred forty-eight".