1218066069 has 8 divisors (see below), whose sum is σ = 1771732512. Its totient is φ = 738221840.

The previous prime is 1218066061. The next prime is 1218066071. The reversal of 1218066069 is 9606608121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1218066069 - 2³ = 1218066061 is a prime.

It is a super-2 number, since 2×1218066069² = 2967369896898225522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218066061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18455514 + ... + 18455579.

It is an arithmetic number, because the mean of its divisors is an integer number (221466564).

Almost surely, 2^1218066069 is an apocalyptic number.

It is an amenable number.

1218066069 is a deficient number, since it is larger than the sum of its proper divisors (553666443).

1218066069 is a wasteful number, since it uses less digits than its factorization.

1218066069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36911107.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1218066069 is about 34900.8032715581. The cubic root of 1218066069 is about 1067.9648242353.

It can be divided in two parts, 12 and 18066069, that added together give a palindrome (18066081).

The spelling of 1218066069 in words is "one billion, two hundred eighteen million, sixty-six thousand, sixty-nine".