667520403 has 8 divisors (see below), whose sum is σ = 970938816. Its totient is φ = 404557800.

The previous prime is 667520401. The next prime is 667520411. The reversal of 667520403 is 304025766.

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

It is not a de Polignac number, because 667520403 - 2¹ = 667520401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 20227891 = 667520403 / (6 + 6 + 7 + 5 + 2 + 0 + 4 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (667520401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10113913 + ... + 10113978.

It is an arithmetic number, because the mean of its divisors is an integer number (121367352).

Almost surely, 2^667520403 is an apocalyptic number.

667520403 is a deficient number, since it is larger than the sum of its proper divisors (303418413).

667520403 is a wasteful number, since it uses less digits than its factorization.

667520403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20227905.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 667520403 is about 25836.4162181987. The cubic root of 667520403 is about 873.9532093602.

The spelling of 667520403 in words is "six hundred sixty-seven million, five hundred twenty thousand, four hundred three".