66347163 has 12 divisors (see below), whose sum is σ = 95977440. Its totient is φ = 44165616.

The previous prime is 66347153. The next prime is 66347173. The reversal of 66347163 is 36174366.

It is a happy number.

66347163 is a `hidden beast` number, since 6 + 634 + 7 + 16 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (66347153) and next prime (66347173).

It is not a de Polignac number, because 66347163 - 2⁵ = 66347131 is a prime.

It is a super-5 number, since 5×66347163⁵ (a number of 40 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (66347153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1345 + ... + 11597.

It is an arithmetic number, because the mean of its divisors is an integer number (7998120).

Almost surely, 2^66347163 is an apocalyptic number.

66347163 is a deficient number, since it is larger than the sum of its proper divisors (29630277).

66347163 is a wasteful number, since it uses less digits than its factorization.

66347163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10978 (or 10975 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 66347163 is about 8145.3767868650. The cubic root of 66347163 is about 404.8313335163.

The spelling of 66347163 in words is "sixty-six million, three hundred forty-seven thousand, one hundred sixty-three".