667429751 has 8 divisors (see below), whose sum is σ = 705136320. Its totient is φ = 630702688.

The previous prime is 667429733. The next prime is 667429753. The reversal of 667429751 is 157924766.

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

It is a cyclic number.

It is not a de Polignac number, because 667429751 - 2¹⁴ = 667413367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667429696 and 667429705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667429753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243476 + ... + 246201.

It is an arithmetic number, because the mean of its divisors is an integer number (88142040).

Almost surely, 2^667429751 is an apocalyptic number.

667429751 is a deficient number, since it is larger than the sum of its proper divisors (37706569).

667429751 is a wasteful number, since it uses less digits than its factorization.

667429751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489753.

The product of its digits is 635040, while the sum is 47.

The square root of 667429751 is about 25834.6618131533. The cubic root of 667429751 is about 873.9136454294.

The spelling of 667429751 in words is "six hundred sixty-seven million, four hundred twenty-nine thousand, seven hundred fifty-one".