667777377340 has 12 divisors (see below), whose sum is σ = 1402332492456. Its totient is φ = 267110950928.

The previous prime is 667777377271. The next prime is 667777377341. The reversal of 667777377340 is 43773777766.

It is a super-3 number, since 3×667777377340³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667777377341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16694434414 + ... + 16694434453.

It is an arithmetic number, because the mean of its divisors is an integer number (116861041038).

Almost surely, 2^667777377340 is an apocalyptic number.

It is an amenable number.

667777377340 is an abundant number, since it is smaller than the sum of its proper divisors (734555115116).

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

667777377340 is a wasteful number, since it uses less digits than its factorization.

667777377340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33388868876 (or 33388868874 counting only the distinct ones).

The product of its (nonzero) digits is 152473104, while the sum is 64.

The spelling of 667777377340 in words is "six hundred sixty-seven billion, seven hundred seventy-seven million, three hundred seventy-seven thousand, three hundred forty".