240520066 has 4 divisors (see below), whose sum is σ = 360780102. Its totient is φ = 120260032.

The previous prime is 240520019. The next prime is 240520081. The reversal of 240520066 is 660025042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 176119441 + 64400625 = 13271^2 + 8025^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 240520066.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60130015 + ... + 60130018.

Almost surely, 2^240520066 is an apocalyptic number.

240520066 is a deficient number, since it is larger than the sum of its proper divisors (120260036).

240520066 is a wasteful number, since it uses less digits than its factorization.

240520066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120260035.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 240520066 is about 15508.7093595824. The cubic root of 240520066 is about 621.8950567877.

The spelling of 240520066 in words is "two hundred forty million, five hundred twenty thousand, sixty-six".