6667077440 has 28 divisors (see below), whose sum is σ = 15875978916. Its totient is φ = 2666830848.

The previous prime is 6667077383. The next prime is 6667077457. The reversal of 6667077440 is 447707666.

It can be written as a sum of positive squares in 2 ways, for example, as 696115456 + 5970961984 = 26384^2 + 77272^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10416989 + ... + 10417628.

It is an arithmetic number, because the mean of its divisors is an integer number (566999247).

Almost surely, 2^6667077440 is an apocalyptic number.

It is an amenable number.

6667077440 is an abundant number, since it is smaller than the sum of its proper divisors (9208901476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6667077440 is a wasteful number, since it uses less digits than its factorization.

6667077440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20834634 (or 20834624 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 47.

The square root of 6667077440 is about 81652.1735166921. The cubic root of 6667077440 is about 1882.1107122188.

The spelling of 6667077440 in words is "six billion, six hundred sixty-seven million, seventy-seven thousand, four hundred forty".