16621066 has 32 divisors (see below), whose sum is σ = 31934592. Its totient is φ = 6298560.

The previous prime is 16621061. The next prime is 16621069. The reversal of 16621066 is 66012661.

16621066 = T₃₉₈ + T₃₉₉ + ... + T₅₄₅.

It is not an unprimeable number, because it can be changed into a prime (16621061) 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, 4240 + ... + 7156.

It is an arithmetic number, because the mean of its divisors is an integer number (997956).

Almost surely, 2^16621066 is an apocalyptic number.

16621066 is a deficient number, since it is larger than the sum of its proper divisors (15313526).

16621066 is a wasteful number, since it uses less digits than its factorization.

16621066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974.

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

The square root of 16621066 is about 4076.8941610005. The cubic root of 16621066 is about 255.2033032037.

The spelling of 16621066 in words is "sixteen million, six hundred twenty-one thousand, sixty-six".