66624943 has 8 divisors (see below), whose sum is σ = 83064960. Its totient is φ = 51915480.

The previous prime is 66624917. The next prime is 66624949. The reversal of 66624943 is 34942666.

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 66624943 - 2⁵ = 66624911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66624896 and 66624905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66624949) 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, 432553 + ... + 432706.

It is an arithmetic number, because the mean of its divisors is an integer number (10383120).

Almost surely, 2^66624943 is an apocalyptic number.

66624943 is a deficient number, since it is larger than the sum of its proper divisors (16440017).

66624943 is a wasteful number, since it uses less digits than its factorization.

66624943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865277.

The product of its digits is 186624, while the sum is 40.

The square root of 66624943 is about 8162.4103670423. The cubic root of 66624943 is about 405.3955247954.

The spelling of 66624943 in words is "sixty-six million, six hundred twenty-four thousand, nine hundred forty-three".