660240426 has 16 divisors (see below), whose sum is σ = 1327860000. Its totient is φ = 218850288.

The previous prime is 660240389. The next prime is 660240433. The reversal of 660240426 is 624042066.

660240426 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 2×660240426² = 871834840249322952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660240393 and 660240402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306301 + ... + 308448.

It is an arithmetic number, because the mean of its divisors is an integer number (82991250).

Almost surely, 2^660240426 is an apocalyptic number.

660240426 is an abundant number, since it is smaller than the sum of its proper divisors (667619574).

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

660240426 is a wasteful number, since it uses less digits than its factorization.

660240426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614933.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 660240426 is about 25695.1440159420. The cubic root of 660240426 is about 870.7644780023.

The spelling of 660240426 in words is "six hundred sixty million, two hundred forty thousand, four hundred twenty-six".