667929842 has 8 divisors (see below), whose sum is σ = 1002335232. Its totient is φ = 333818100.

The previous prime is 667929841. The next prime is 667929851. The reversal of 667929842 is 248929766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×667929842² = 892260547668289928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (667929841) 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 3 ways as a sum of consecutive naturals, for example, 67634 + ... + 76877.

It is an arithmetic number, because the mean of its divisors is an integer number (125291904).

Almost surely, 2^667929842 is an apocalyptic number.

667929842 is a deficient number, since it is larger than the sum of its proper divisors (334405390).

667929842 is a wasteful number, since it uses less digits than its factorization.

667929842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146824.

The product of its digits is 2612736, while the sum is 53.

The square root of 667929842 is about 25844.3386837427. The cubic root of 667929842 is about 874.1318592762.

The spelling of 667929842 in words is "six hundred sixty-seven million, nine hundred twenty-nine thousand, eight hundred forty-two".