1646416667 has 8 divisors (see below), whose sum is σ = 1898271456. Its totient is φ = 1398724992.

The previous prime is 1646416649. The next prime is 1646416687. The reversal of 1646416667 is 7666146461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1646416667 - 2⁸ = 1646416411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1646416687) 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 in 7 ways as a sum of consecutive naturals, for example, 1039928 + ... + 1041509.

It is an arithmetic number, because the mean of its divisors is an integer number (237283932).

Almost surely, 2^1646416667 is an apocalyptic number.

1646416667 is a deficient number, since it is larger than the sum of its proper divisors (251854789).

1646416667 is a wasteful number, since it uses less digits than its factorization.

1646416667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081557.

The product of its digits is 870912, while the sum is 47.

The square root of 1646416667 is about 40576.0602695727. The cubic root of 1646416667 is about 1180.8097159590.

The spelling of 1646416667 in words is "one billion, six hundred forty-six million, four hundred sixteen thousand, six hundred sixty-seven".