667237247947 has 2 divisors, whose sum is σ = 667237247948. Its totient is φ = 667237247946.

The previous prime is 667237247867. The next prime is 667237247959. The reversal of 667237247947 is 749742732766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667237247947 is a prime.

It is not a weakly prime, because it can be changed into another prime (667237247447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333618623973 + 333618623974.

It is an arithmetic number, because the mean of its divisors is an integer number (333618623974).

Almost surely, 2^667237247947 is an apocalyptic number.

667237247947 is a deficient number, since it is larger than the sum of its proper divisors (1).

667237247947 is an equidigital number, since it uses as much as digits as its factorization.

667237247947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 149361408, while the sum is 64.

The spelling of 667237247947 in words is "six hundred sixty-seven billion, two hundred thirty-seven million, two hundred forty-seven thousand, nine hundred forty-seven".