661102760 has 16 divisors (see below), whose sum is σ = 1487481300. Its totient is φ = 264441088.

The previous prime is 661102759. The next prime is 661102829. The reversal of 661102760 is 67201166.

It can be written as a sum of positive squares in 2 ways, for example, as 608016964 + 53085796 = 24658^2 + 7286^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8263745 + ... + 8263824.

Almost surely, 2^661102760 is an apocalyptic number.

It is an amenable number.

661102760 is an abundant number, since it is smaller than the sum of its proper divisors (826378540).

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

661102760 is a wasteful number, since it uses less digits than its factorization.

661102760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16527580 (or 16527576 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 661102760 is about 25711.9186370835. The cubic root of 661102760 is about 871.1434122575.

The spelling of 661102760 in words is "six hundred sixty-one million, one hundred two thousand, seven hundred sixty".