667406796738 has 32 divisors (see below), whose sum is σ = 1456229290752. Its totient is φ = 202234899600.

The previous prime is 667406796733. The next prime is 667406796739. The reversal of 667406796738 is 837697604766.

It is not an unprimeable number, because it can be changed into a prime (667406796733) 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 15 ways as a sum of consecutive naturals, for example, 1231573 + ... + 1688663.

It is an arithmetic number, because the mean of its divisors is an integer number (45507165336).

Almost surely, 2^667406796738 is an apocalyptic number.

667406796738 is an abundant number, since it is smaller than the sum of its proper divisors (788822494014).

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

667406796738 is a wasteful number, since it uses less digits than its factorization.

667406796738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479230.

The product of its (nonzero) digits is 384072192, while the sum is 69.

The spelling of 667406796738 in words is "six hundred sixty-seven billion, four hundred six million, seven hundred ninety-six thousand, seven hundred thirty-eight".