667033997 has 8 divisors (see below), whose sum is σ = 769873152. Its totient is φ = 566082000.

The previous prime is 667033993. The next prime is 667034009. The reversal of 667033997 is 799330766.

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 667033997 - 2² = 667033993 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 (667033993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471029 + ... + 472442.

It is an arithmetic number, because the mean of its divisors is an integer number (96234144).

Almost surely, 2^667033997 is an apocalyptic number.

It is an amenable number.

667033997 is a deficient number, since it is larger than the sum of its proper divisors (102839155).

667033997 is a wasteful number, since it uses less digits than its factorization.

667033997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943579.

The product of its (nonzero) digits is 1285956, while the sum is 50.

The square root of 667033997 is about 25827.0013164517. The cubic root of 667033997 is about 873.7408815786.

The spelling of 667033997 in words is "six hundred sixty-seven million, thirty-three thousand, nine hundred ninety-seven".