1660040559 has 6 divisors (see below), whose sum is σ = 2397836376. Its totient is φ = 1106693700.

The previous prime is 1660040539. The next prime is 1660040567. The reversal of 1660040559 is 9550400661.

1660040559 is a `hidden beast` number, since 1 + 6 + 60 + 0 + 40 + 559 = 666.

It is not a de Polignac number, because 1660040559 - 2⁵ = 1660040527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660040539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92224467 + ... + 92224484.

It is an arithmetic number, because the mean of its divisors is an integer number (399639396).

Almost surely, 2^1660040559 is an apocalyptic number.

1660040559 is a deficient number, since it is larger than the sum of its proper divisors (737795817).

1660040559 is a wasteful number, since it uses less digits than its factorization.

1660040559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184448957 (or 184448954 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1660040559 is about 40743.5953126378. The cubic root of 1660040559 is about 1184.0577907995.

The spelling of 1660040559 in words is "one billion, six hundred sixty million, forty thousand, five hundred fifty-nine".