661025132 has 12 divisors (see below), whose sum is σ = 1157549736. Its totient is φ = 330296640.

The previous prime is 661025117. The next prime is 661025179. The reversal of 661025132 is 231520166.

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, 46994 + ... + 59417.

It is an arithmetic number, because the mean of its divisors is an integer number (96462478).

Almost surely, 2^661025132 is an apocalyptic number.

It is an amenable number.

661025132 is a deficient number, since it is larger than the sum of its proper divisors (496524604).

661025132 is a wasteful number, since it uses less digits than its factorization.

661025132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107968 (or 107966 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 661025132 is about 25710.4090204726. The cubic root of 661025132 is about 871.1093137925.

Adding to 661025132 its reverse (231520166), we get a palindrome (892545298).

The spelling of 661025132 in words is "six hundred sixty-one million, twenty-five thousand, one hundred thirty-two".