660444741 has 36 divisors (see below), whose sum is σ = 1052781184. Its totient is φ = 398669040.

The previous prime is 660444691. The next prime is 660444749. The reversal of 660444741 is 147444066.

660444741 is a `hidden beast` number, since 6 + 604 + 4 + 4 + 7 + 41 = 666.

It is not a de Polignac number, because 660444741 - 2⁷ = 660444613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660444696 and 660444705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660444749) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 307116 + ... + 309258.

Almost surely, 2^660444741 is an apocalyptic number.

It is an amenable number.

660444741 is a deficient number, since it is larger than the sum of its proper divisors (392336443).

660444741 is a wasteful number, since it uses less digits than its factorization.

660444741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 660444741 is about 25699.1194596235. The cubic root of 660444741 is about 870.8542896773.

The spelling of 660444741 in words is "six hundred sixty million, four hundred forty-four thousand, seven hundred forty-one".