667147553 has 2 divisors, whose sum is σ = 667147554. Its totient is φ = 667147552.

The previous prime is 667147549. The next prime is 667147567. The reversal of 667147553 is 355741766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663989824 + 3157729 = 25768^2 + 1777^2 .

It is a cyclic number.

It is not a de Polignac number, because 667147553 - 2² = 667147549 is a prime.

It is not a weakly prime, because it can be changed into another prime (667147543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333573776 + 333573777.

It is an arithmetic number, because the mean of its divisors is an integer number (333573777).

Almost surely, 2^667147553 is an apocalyptic number.

It is an amenable number.

667147553 is a deficient number, since it is larger than the sum of its proper divisors (1).

667147553 is an equidigital number, since it uses as much as digits as its factorization.

667147553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 44.

The square root of 667147553 is about 25829.1996198101. The cubic root of 667147553 is about 873.7904607056.

The spelling of 667147553 in words is "six hundred sixty-seven million, one hundred forty-seven thousand, five hundred fifty-three".