12966554 has 4 divisors (see below), whose sum is σ = 19449834. Its totient is φ = 6483276.

The previous prime is 12966497. The next prime is 12966557. The reversal of 12966554 is 45566921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45566921 = 19 ⋅2398259.

It can be written as a sum of positive squares in only one way, i.e., 12411529 + 555025 = 3523^2 + 745^2 .

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3241637 + ... + 3241640.

Almost surely, 2^12966554 is an apocalyptic number.

12966554 is a deficient number, since it is larger than the sum of its proper divisors (6483280).

12966554 is an equidigital number, since it uses as much as digits as its factorization.

12966554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483279.

The product of its digits is 64800, while the sum is 38.

The square root of 12966554 is about 3600.9101627228. The cubic root of 12966554 is about 234.9316475420.

The spelling of 12966554 in words is "twelve million, nine hundred sixty-six thousand, five hundred fifty-four".