16063666 has 4 divisors (see below), whose sum is σ = 24095502. Its totient is φ = 8031832.

The previous prime is 16063633. The next prime is 16063667. The reversal of 16063666 is 66636061.

It is a happy number.

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., 11758041 + 4305625 = 3429^2 + 2075^2 .

It is not an unprimeable number, because it can be changed into a prime (16063667) 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, 4015915 + ... + 4015918.

Almost surely, 2^16063666 is an apocalyptic number.

16063666 is a deficient number, since it is larger than the sum of its proper divisors (8031836).

16063666 is an equidigital number, since it uses as much as digits as its factorization.

16063666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8031835.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 16063666 is about 4007.9503489939. The cubic root of 16063666 is about 252.3179932045.

It can be divided in two parts, 1606 and 3666, that multiplied together give a triangular number (5887596 = T₃₄₃₁).

The spelling of 16063666 in words is "sixteen million, sixty-three thousand, six hundred sixty-six".