16012666 has 4 divisors (see below), whose sum is σ = 24019002. Its totient is φ = 8006332.

The previous prime is 16012651. The next prime is 16012679. The reversal of 16012666 is 66621061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13359025 + 2653641 = 3655^2 + 1629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4003165 + ... + 4003168.

Almost surely, 2^16012666 is an apocalyptic number.

16012666 is a deficient number, since it is larger than the sum of its proper divisors (8006336).

16012666 is an equidigital number, since it uses as much as digits as its factorization.

16012666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8006335.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 16012666 is about 4001.5829367889. The cubic root of 16012666 is about 252.0506847744.

The spelling of 16012666 in words is "sixteen million, twelve thousand, six hundred sixty-six".