66255879019 has 8 divisors (see below), whose sum is σ = 72281035008. Its totient is φ = 60231038760.

The previous prime is 66255879017. The next prime is 66255879037. The reversal of 66255879019 is 91097855266.

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 66255879019 - 2¹ = 66255879017 is a prime.

It is a super-2 number, since 2×66255879019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66255879017) 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, 663594 + ... + 756880.

It is an arithmetic number, because the mean of its divisors is an integer number (9035129376).

Almost surely, 2^66255879019 is an apocalyptic number.

66255879019 is a deficient number, since it is larger than the sum of its proper divisors (6025155989).

66255879019 is a wasteful number, since it uses less digits than its factorization.

66255879019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157865.

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 66255879019 in words is "sixty-six billion, two hundred fifty-five million, eight hundred seventy-nine thousand, nineteen".