66414263 has 4 divisors (see below), whose sum is σ = 68704440. Its totient is φ = 64124088.

The previous prime is 66414239. The next prime is 66414277. The reversal of 66414263 is 36241466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36241466 = 2 ⋅18120733.

It is a cyclic number.

It is not a de Polignac number, because 66414263 - 2⁶ = 66414199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66414163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1145045 + ... + 1145102.

It is an arithmetic number, because the mean of its divisors is an integer number (17176110).

Almost surely, 2^66414263 is an apocalyptic number.

66414263 is a deficient number, since it is larger than the sum of its proper divisors (2290177).

66414263 is a wasteful number, since it uses less digits than its factorization.

66414263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290176.

The product of its digits is 20736, while the sum is 32.

The square root of 66414263 is about 8149.4946469091. The cubic root of 66414263 is about 404.9677625105.

The spelling of 66414263 in words is "sixty-six million, four hundred fourteen thousand, two hundred sixty-three".