66863941 has 8 divisors (see below), whose sum is σ = 71694720. Its totient is φ = 62132928.

The previous prime is 66863911. The next prime is 66863957. The reversal of 66863941 is 14936866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66863941 - 2¹⁹ = 66339653 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 (66863911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23551 + ... + 26236.

It is an arithmetic number, because the mean of its divisors is an integer number (8961840).

Almost surely, 2^66863941 is an apocalyptic number.

It is an amenable number.

66863941 is a deficient number, since it is larger than the sum of its proper divisors (4830779).

66863941 is a wasteful number, since it uses less digits than its factorization.

66863941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49883.

The product of its digits is 186624, while the sum is 43.

The square root of 66863941 is about 8177.0374219518. The cubic root of 66863941 is about 405.8796932967.

The spelling of 66863941 in words is "sixty-six million, eight hundred sixty-three thousand, nine hundred forty-one".