667242734 has 4 divisors (see below), whose sum is σ = 1000864104. Its totient is φ = 333621366.

The previous prime is 667242731. The next prime is 667242787. The reversal of 667242734 is 437242766.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 667242691 and 667242700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667242731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166810682 + ... + 166810685.

It is an arithmetic number, because the mean of its divisors is an integer number (250216026).

Almost surely, 2^667242734 is an apocalyptic number.

667242734 is a deficient number, since it is larger than the sum of its proper divisors (333621370).

667242734 is a wasteful number, since it uses less digits than its factorization.

667242734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333621369.

The product of its digits is 338688, while the sum is 41.

The square root of 667242734 is about 25831.0420618294. The cubic root of 667242734 is about 873.8320128803.

The spelling of 667242734 in words is "six hundred sixty-seven million, two hundred forty-two thousand, seven hundred thirty-four".