661461232 has 40 divisors (see below), whose sum is σ = 1383438240. Its totient is φ = 305437440.

The previous prime is 661461223. The next prime is 661461239. The reversal of 661461232 is 232164166.

661461232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×661461232² = 875061922877915648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 661461194 and 661461203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661461239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20319 + ... + 41662.

It is an arithmetic number, because the mean of its divisors is an integer number (34585956).

Almost surely, 2^661461232 is an apocalyptic number.

It is an amenable number.

661461232 is an abundant number, since it is smaller than the sum of its proper divisors (721977008).

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

661461232 is a wasteful number, since it uses less digits than its factorization.

661461232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62041 (or 62035 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 661461232 is about 25718.8886229557. Note that the first 3 decimals coincide. The cubic root of 661461232 is about 871.3008381597.

The spelling of 661461232 in words is "six hundred sixty-one million, four hundred sixty-one thousand, two hundred thirty-two".