666671624467 has 2 divisors, whose sum is σ = 666671624468. Its totient is φ = 666671624466.

The previous prime is 666671624461. The next prime is 666671624473. The reversal of 666671624467 is 764426176666.

666671624467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (666671624461) and next prime (666671624473).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666671624467 is a prime.

It is not a weakly prime, because it can be changed into another prime (666671624461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333335812233 + 333335812234.

It is an arithmetic number, because the mean of its divisors is an integer number (333335812234).

Almost surely, 2^666671624467 is an apocalyptic number.

666671624467 is a deficient number, since it is larger than the sum of its proper divisors (1).

666671624467 is an equidigital number, since it uses as much as digits as its factorization.

666671624467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 61.

The spelling of 666671624467 in words is "six hundred sixty-six billion, six hundred seventy-one million, six hundred twenty-four thousand, four hundred sixty-seven".