660666211512 has 32 divisors (see below), whose sum is σ = 1651730516880. Its totient is φ = 220213405440.

The previous prime is 660666211483. The next prime is 660666211537. The reversal of 660666211512 is 215112666066.

660666211512 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 2×660666211512² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 96438 + ... + 1153530.

Almost surely, 2^660666211512 is an apocalyptic number.

It is an amenable number.

660666211512 is an abundant number, since it is smaller than the sum of its proper divisors (991064305368).

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

660666211512 is a wasteful number, since it uses less digits than its factorization.

660666211512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083143 (or 1083139 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

Adding to 660666211512 its reverse (215112666066), we get a palindrome (875778877578).

The spelling of 660666211512 in words is "six hundred sixty billion, six hundred sixty-six million, two hundred eleven thousand, five hundred twelve".