449778667 has 8 divisors (see below), whose sum is σ = 495642224. Its totient is φ = 405524448.

The previous prime is 449778647. The next prime is 449778683. The reversal of 449778667 is 766877944.

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

It is a cyclic number.

It is not a de Polignac number, because 449778667 - 2²⁷ = 315560939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449778607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401748 + ... + 402865.

It is an arithmetic number, because the mean of its divisors is an integer number (61955278).

Almost surely, 2^449778667 is an apocalyptic number.

449778667 is a deficient number, since it is larger than the sum of its proper divisors (45863557).

449778667 is a wasteful number, since it uses less digits than its factorization.

449778667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804669.

The product of its digits is 14224896, while the sum is 58.

The square root of 449778667 is about 21207.9859251179. The cubic root of 449778667 is about 766.1837750745.

The spelling of 449778667 in words is "four hundred forty-nine million, seven hundred seventy-eight thousand, six hundred sixty-seven".