66863942 has 8 divisors (see below), whose sum is σ = 100334136. Its totient is φ = 33419232.

The previous prime is 66863911. The next prime is 66863957. The reversal of 66863942 is 24936866.

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

It is a junction number, because it is equal to n+sod(n) for n = 66863893 and 66863902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2873 + ... + 11915.

It is an arithmetic number, because the mean of its divisors is an integer number (12541767).

Almost surely, 2^66863942 is an apocalyptic number.

66863942 is a deficient number, since it is larger than the sum of its proper divisors (33470194).

66863942 is a wasteful number, since it uses less digits than its factorization.

66863942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12742.

The product of its digits is 373248, while the sum is 44.

The square root of 66863942 is about 8177.0374830986. The cubic root of 66863942 is about 405.8796953201.

The spelling of 66863942 in words is "sixty-six million, eight hundred sixty-three thousand, nine hundred forty-two".