66701147 has 2 divisors, whose sum is σ = 66701148. Its totient is φ = 66701146.

The previous prime is 66701111. The next prime is 66701179. The reversal of 66701147 is 74110766.

It is a happy number.

It is an a-pointer prime, because the next prime (66701179) can be obtained adding 66701147 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66701147 - 2²⁰ = 65652571 is a prime.

It is a super-2 number, since 2×66701147² = 8898086022231218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66709147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350573 + 33350574.

It is an arithmetic number, because the mean of its divisors is an integer number (33350574).

Almost surely, 2^66701147 is an apocalyptic number.

66701147 is a deficient number, since it is larger than the sum of its proper divisors (1).

66701147 is an equidigital number, since it uses as much as digits as its factorization.

66701147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 66701147 is about 8167.0770169015. The cubic root of 66701147 is about 405.5500264406.

The spelling of 66701147 in words is "sixty-six million, seven hundred one thousand, one hundred forty-seven".