1216660059 has 6 divisors (see below), whose sum is σ = 1757397876. Its totient is φ = 811106700.

The previous prime is 1216660057. The next prime is 1216660111. The reversal of 1216660059 is 9500666121.

It is not a de Polignac number, because 1216660059 - 2¹ = 1216660057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216660051) 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, 67592217 + ... + 67592234.

It is an arithmetic number, because the mean of its divisors is an integer number (292899646).

Almost surely, 2^1216660059 is an apocalyptic number.

1216660059 is a deficient number, since it is larger than the sum of its proper divisors (540737817).

1216660059 is a wasteful number, since it uses less digits than its factorization.

1216660059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135184457 (or 135184454 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1216660059 is about 34880.6545093408. The cubic root of 1216660059 is about 1067.5537498325.

The spelling of 1216660059 in words is "one billion, two hundred sixteen million, six hundred sixty thousand, fifty-nine".