12966555 has 16 divisors (see below), whose sum is σ = 23710464. Its totient is φ = 5927520.

The previous prime is 12966497. The next prime is 12966557. The reversal of 12966555 is 55566921.

It is not a de Polignac number, because 12966555 - 2⁶ = 12966491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12966557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61641 + ... + 61850.

It is an arithmetic number, because the mean of its divisors is an integer number (1481904).

Almost surely, 2^12966555 is an apocalyptic number.

12966555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12966555 is a deficient number, since it is larger than the sum of its proper divisors (10743909).

12966555 is a wasteful number, since it uses less digits than its factorization.

12966555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123506.

The product of its digits is 81000, while the sum is 39.

The square root of 12966555 is about 3600.9103015765. The cubic root of 12966555 is about 234.9316535814.

The spelling of 12966555 in words is "twelve million, nine hundred sixty-six thousand, five hundred fifty-five".