66617242043 has 8 divisors (see below), whose sum is σ = 72725318400. Its totient is φ = 60517826280.

The previous prime is 66617242031. The next prime is 66617242057. The reversal of 66617242043 is 34024271666.

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 66617242043 - 2¹⁸ = 66616979899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66617242073) 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, 2149055 + ... + 2179832.

It is an arithmetic number, because the mean of its divisors is an integer number (9090664800).

Almost surely, 2^66617242043 is an apocalyptic number.

66617242043 is a deficient number, since it is larger than the sum of its proper divisors (6108076357).

66617242043 is a wasteful number, since it uses less digits than its factorization.

66617242043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330297.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 66617242043 in words is "sixty-six billion, six hundred seventeen million, two hundred forty-two thousand, forty-three".