667367538 has 32 divisors (see below), whose sum is σ = 1414355904. Its totient is φ = 209206272.

The previous prime is 667367531. The next prime is 667367543. The reversal of 667367538 is 835763766.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (667367531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245181 + ... + 247887.

It is an arithmetic number, because the mean of its divisors is an integer number (44198622).

Almost surely, 2^667367538 is an apocalyptic number.

667367538 is an abundant number, since it is smaller than the sum of its proper divisors (746988366).

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

667367538 is a wasteful number, since it uses less digits than its factorization.

667367538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146.

The product of its digits is 3810240, while the sum is 51.

The square root of 667367538 is about 25833.4577244317. The cubic root of 667367538 is about 873.8864912713.

The spelling of 667367538 in words is "six hundred sixty-seven million, three hundred sixty-seven thousand, five hundred thirty-eight".