667699201 has 8 divisors (see below), whose sum is σ = 719659304. Its totient is φ = 615824640.

The previous prime is 667699189. The next prime is 667699213. The reversal of 667699201 is 102996766.

It is an interprime number because it is at equal distance from previous prime (667699189) and next prime (667699213).

It can be written as a sum of positive squares in 4 ways, for example, as 171479025 + 496220176 = 13095^2 + 22276^2 .

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 667699201 - 2⁵ = 667699169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667699601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4680 + ... + 36841.

It is an arithmetic number, because the mean of its divisors is an integer number (89957413).

Almost surely, 2^667699201 is an apocalyptic number.

It is an amenable number.

667699201 is a deficient number, since it is larger than the sum of its proper divisors (51960103).

667699201 is a wasteful number, since it uses less digits than its factorization.

667699201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42771.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 667699201 is about 25839.8761800439. The cubic root of 667699201 is about 874.0312330109.

The spelling of 667699201 in words is "six hundred sixty-seven million, six hundred ninety-nine thousand, two hundred one".