667777244 has 12 divisors (see below), whose sum is σ = 1168805568. Its totient is φ = 333832800.

The previous prime is 667777241. The next prime is 667777261. The reversal of 667777244 is 442777766.

It is a super-3 number, since 3×667777244³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667777192 and 667777201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667777241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25109 + ... + 44339.

It is an arithmetic number, because the mean of its divisors is an integer number (97400464).

Almost surely, 2^667777244 is an apocalyptic number.

It is an amenable number.

667777244 is a deficient number, since it is larger than the sum of its proper divisors (501028324).

667777244 is a wasteful number, since it uses less digits than its factorization.

667777244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27916 (or 27914 counting only the distinct ones).

The product of its digits is 2765952, while the sum is 50.

The square root of 667777244 is about 25841.3862631245. The cubic root of 667777244 is about 874.0652849522.

The spelling of 667777244 in words is "six hundred sixty-seven million, seven hundred seventy-seven thousand, two hundred forty-four".