667327401 has 48 divisors (see below), whose sum is σ = 1106645904. Its totient is φ = 383864832.

The previous prime is 667327393. The next prime is 667327403. The reversal of 667327401 is 104723766.

It can be written as a sum of positive squares in 8 ways, for example, as 120890025 + 546437376 = 10995^2 + 23376^2 .

It is not a de Polignac number, because 667327401 - 2³ = 667327393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667327403) 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 47 ways as a sum of consecutive naturals, for example, 311205 + ... + 313341.

It is an arithmetic number, because the mean of its divisors is an integer number (23055123).

Almost surely, 2^667327401 is an apocalyptic number.

It is an amenable number.

667327401 is a deficient number, since it is larger than the sum of its proper divisors (439318503).

667327401 is a wasteful number, since it uses less digits than its factorization.

667327401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 667327401 is about 25832.6808713304. The cubic root of 667327401 is about 873.8689717470.

The spelling of 667327401 in words is "six hundred sixty-seven million, three hundred twenty-seven thousand, four hundred one".