240665557 has 8 divisors (see below), whose sum is σ = 266848992. Its totient is φ = 215199600.

The previous prime is 240665497. The next prime is 240665561. The reversal of 240665557 is 755566042.

240665557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 240665557 - 2⁷ = 240665429 is a prime.

It is a super-2 number, since 2×240665557² = 115839820652240498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240665567) 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, 178663 + ... + 180004.

It is an arithmetic number, because the mean of its divisors is an integer number (33356124).

Almost surely, 2^240665557 is an apocalyptic number.

It is an amenable number.

240665557 is a deficient number, since it is larger than the sum of its proper divisors (26183435).

240665557 is a wasteful number, since it uses less digits than its factorization.

240665557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358739.

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 240665557 is about 15513.3992728866. The cubic root of 240665557 is about 622.0204266407.

The spelling of 240665557 in words is "two hundred forty million, six hundred sixty-five thousand, five hundred fifty-seven".