66541063 has 4 divisors (see below), whose sum is σ = 66571200. Its totient is φ = 66510928.

The previous prime is 66541039. The next prime is 66541087. The reversal of 66541063 is 36014566.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66541039) and next prime (66541087).

It is a cyclic number.

It is not a de Polignac number, because 66541063 - 2⁵ = 66541031 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 (66541003) 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, 11470 + ... + 16267.

It is an arithmetic number, because the mean of its divisors is an integer number (16642800).

Almost surely, 2^66541063 is an apocalyptic number.

66541063 is a deficient number, since it is larger than the sum of its proper divisors (30137).

66541063 is a wasteful number, since it uses less digits than its factorization.

66541063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30136.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66541063 is about 8157.2705606716. The cubic root of 66541063 is about 405.2253239891.

The spelling of 66541063 in words is "sixty-six million, five hundred forty-one thousand, sixty-three".