667437738942 has 16 divisors (see below), whose sum is σ = 1437558207120. Its totient is φ = 205365458112.

The previous prime is 667437738911. The next prime is 667437738949. The reversal of 667437738942 is 249837734766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667437738949) 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, 4278446967 + ... + 4278447122.

It is an arithmetic number, because the mean of its divisors is an integer number (89847387945).

Almost surely, 2^667437738942 is an apocalyptic number.

667437738942 is an abundant number, since it is smaller than the sum of its proper divisors (770120468178).

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

667437738942 is a wasteful number, since it uses less digits than its factorization.

667437738942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8556894107.

The product of its digits is 256048128, while the sum is 66.

The spelling of 667437738942 in words is "six hundred sixty-seven billion, four hundred thirty-seven million, seven hundred thirty-eight thousand, nine hundred forty-two".