667441630451 has 4 divisors (see below), whose sum is σ = 667445014272. Its totient is φ = 667438246632.

The previous prime is 667441630423. The next prime is 667441630463. The reversal of 667441630451 is 154036144766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 667441630451 - 2²⁶ = 667374521587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667441630396 and 667441630405.

It is not an unprimeable number, because it can be changed into a prime (667441630421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376435 + ... + 1797068.

It is an arithmetic number, because the mean of its divisors is an integer number (166861253568).

Almost surely, 2^667441630451 is an apocalyptic number.

667441630451 is a deficient number, since it is larger than the sum of its proper divisors (3383821).

667441630451 is a wasteful number, since it uses less digits than its factorization.

667441630451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383820.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 667441630451 in words is "six hundred sixty-seven billion, four hundred forty-one million, six hundred thirty thousand, four hundred fifty-one".