667729141 has 8 divisors (see below), whose sum is σ = 717828480. Its totient is φ = 619125408.

The previous prime is 667729081. The next prime is 667729163. The reversal of 667729141 is 141927766.

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 667729141 - 2⁹ = 667728629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667729171) 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 7 ways as a sum of consecutive naturals, for example, 372976 + ... + 374761.

It is an arithmetic number, because the mean of its divisors is an integer number (89728560).

Almost surely, 2^667729141 is an apocalyptic number.

It is an amenable number.

667729141 is a deficient number, since it is larger than the sum of its proper divisors (50099339).

667729141 is a wasteful number, since it uses less digits than its factorization.

667729141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747803.

The product of its digits is 127008, while the sum is 43.

The square root of 667729141 is about 25840.4555106910. The cubic root of 667729141 is about 874.0442968296.

The spelling of 667729141 in words is "six hundred sixty-seven million, seven hundred twenty-nine thousand, one hundred forty-one".