261660352 has 14 divisors (see below), whose sum is σ = 519232388. Its totient is φ = 130830144.

The previous prime is 261660349. The next prime is 261660361. The reversal of 261660352 is 253066162.

261660352 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 2×261660352² = 136932279617527808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2044158 + ... + 2044285.

Almost surely, 2^261660352 is an apocalyptic number.

It is an amenable number.

261660352 is a deficient number, since it is larger than the sum of its proper divisors (257572036).

261660352 is an equidigital number, since it uses as much as digits as its factorization.

261660352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088455 (or 4088445 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 261660352 is about 16175.9188919826. The cubic root of 261660352 is about 639.6061639453.

The spelling of 261660352 in words is "two hundred sixty-one million, six hundred sixty thousand, three hundred fifty-two".