66360947 has 2 divisors, whose sum is σ = 66360948. Its totient is φ = 66360946.

The previous prime is 66360941. The next prime is 66360971. The reversal of 66360947 is 74906366.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66360947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66360941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33180473 + 33180474.

It is an arithmetic number, because the mean of its divisors is an integer number (33180474).

Almost surely, 2^66360947 is an apocalyptic number.

66360947 is a deficient number, since it is larger than the sum of its proper divisors (1).

66360947 is an equidigital number, since it uses as much as digits as its factorization.

66360947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 66360947 is about 8146.2228670716. Note that the first 3 decimals coincide. The cubic root of 66360947 is about 404.8593669114.

The spelling of 66360947 in words is "sixty-six million, three hundred sixty thousand, nine hundred forty-seven".