667682238 has 16 divisors (see below), whose sum is σ = 1335626640. Its totient is φ = 222517056.

The previous prime is 667682233. The next prime is 667682251. The reversal of 667682238 is 832286766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667682233) 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, 41656 + ... + 55412.

It is an arithmetic number, because the mean of its divisors is an integer number (83476665).

Almost surely, 2^667682238 is an apocalyptic number.

667682238 is an abundant number, since it is smaller than the sum of its proper divisors (667944402).

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

667682238 is a wasteful number, since it uses less digits than its factorization.

667682238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21851.

The product of its digits is 1161216, while the sum is 48.

The square root of 667682238 is about 25839.5479449622. The cubic root of 667682238 is about 874.0238313159.

It can be divided in two parts, 66768 and 2238, that added together give a triangular number (69006 = T₃₇₁).

The spelling of 667682238 in words is "six hundred sixty-seven million, six hundred eighty-two thousand, two hundred thirty-eight".