16646211466 has 4 divisors (see below), whose sum is σ = 24969317202. Its totient is φ = 8323105732.

The previous prime is 16646211457. The next prime is 16646211481. The reversal of 16646211466 is 66411264661.

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., 16506853441 + 139358025 = 128479^2 + 11805^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4161552865 + ... + 4161552868.

Almost surely, 2^16646211466 is an apocalyptic number.

16646211466 is a deficient number, since it is larger than the sum of its proper divisors (8323105736).

16646211466 is an equidigital number, since it uses as much as digits as its factorization.

16646211466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8323105735.

The product of its digits is 248832, while the sum is 43.

The spelling of 16646211466 in words is "sixteen billion, six hundred forty-six million, two hundred eleven thousand, four hundred sixty-six".