661268152 has 8 divisors (see below), whose sum is σ = 1239877800. Its totient is φ = 330634072.

The previous prime is 661268149. The next prime is 661268189. The reversal of 661268152 is 251862166.

661268152 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41329252 + ... + 41329267.

It is an arithmetic number, because the mean of its divisors is an integer number (154984725).

Almost surely, 2^661268152 is an apocalyptic number.

It is an amenable number.

661268152 is a deficient number, since it is larger than the sum of its proper divisors (578609648).

661268152 is a wasteful number, since it uses less digits than its factorization.

661268152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82658525 (or 82658521 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 661268152 is about 25715.1346875726. The cubic root of 661268152 is about 871.2160525723.

The spelling of 661268152 in words is "six hundred sixty-one million, two hundred sixty-eight thousand, one hundred fifty-two".