667077738 has 16 divisors (see below), whose sum is σ = 1351044480. Its totient is φ = 219544416.

The previous prime is 667077737. The next prime is 667077743. The reversal of 667077738 is 837770766.

667077738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667077737) 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, 703195 + ... + 704142.

It is an arithmetic number, because the mean of its divisors is an integer number (84440280).

Almost surely, 2^667077738 is an apocalyptic number.

667077738 is an abundant number, since it is smaller than the sum of its proper divisors (683966742).

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

667077738 is a wasteful number, since it uses less digits than its factorization.

667077738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407421.

The product of its (nonzero) digits is 2074464, while the sum is 51.

The square root of 667077738 is about 25827.8481101310. The cubic root of 667077738 is about 873.7599797878.

The spelling of 667077738 in words is "six hundred sixty-seven million, seventy-seven thousand, seven hundred thirty-eight".