667424735738 has 8 divisors (see below), whose sum is σ = 1002028591488. Its totient is φ = 333415205244.

The previous prime is 667424735689. The next prime is 667424735777. The reversal of 667424735738 is 837537424766.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148578506 + ... + 148582997.

It is an arithmetic number, because the mean of its divisors is an integer number (125253573936).

Almost surely, 2^667424735738 is an apocalyptic number.

667424735738 is a deficient number, since it is larger than the sum of its proper divisors (334603855750).

667424735738 is a wasteful number, since it uses less digits than its factorization.

667424735738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297162628.

The product of its digits is 142248960, while the sum is 62.

The spelling of 667424735738 in words is "six hundred sixty-seven billion, four hundred twenty-four million, seven hundred thirty-five thousand, seven hundred thirty-eight".