667462805421 has 8 divisors (see below), whose sum is σ = 889954761024. Its totient is φ = 444973026720.

The previous prime is 667462805419. The next prime is 667462805423. The reversal of 667462805421 is 124508264766.

It is an interprime number because it is at equal distance from previous prime (667462805419) and next prime (667462805423).

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

It is not a de Polignac number, because 667462805421 - 2¹ = 667462805419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667462805423) 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 7 ways as a sum of consecutive naturals, for example, 410440 + ... + 1226126.

It is an arithmetic number, because the mean of its divisors is an integer number (111244345128).

Almost surely, 2^667462805421 is an apocalyptic number.

It is an amenable number.

667462805421 is a deficient number, since it is larger than the sum of its proper divisors (222491955603).

667462805421 is a wasteful number, since it uses less digits than its factorization.

667462805421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088451.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 667462805421 in words is "six hundred sixty-seven billion, four hundred sixty-two million, eight hundred five thousand, four hundred twenty-one".