4451668477 has 4 divisors (see below), whose sum is σ = 4452679836. Its totient is φ = 4450657120.

The previous prime is 4451668447. The next prime is 4451668493. The reversal of 4451668477 is 7748661544.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1865030596 + 2586637881 = 43186^2 + 50859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4451668477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4451668427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499048 + ... + 507889.

It is an arithmetic number, because the mean of its divisors is an integer number (1113169959).

Almost surely, 2^4451668477 is an apocalyptic number.

It is an amenable number.

4451668477 is a deficient number, since it is larger than the sum of its proper divisors (1011359).

4451668477 is a wasteful number, since it uses less digits than its factorization.

4451668477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011358.

The product of its digits is 4515840, while the sum is 52.

The square root of 4451668477 is about 66720.8249124664. The cubic root of 4451668477 is about 1645.0317005005.

The spelling of 4451668477 in words is "four billion, four hundred fifty-one million, six hundred sixty-eight thousand, four hundred seventy-seven".