139666404259 has 8 divisors (see below), whose sum is σ = 143263902320. Its totient is φ = 136084790016.

The previous prime is 139666404247. The next prime is 139666404287. The reversal of 139666404259 is 952404666931.

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 139666404259 - 2¹⁹ = 139665879971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139666404299) 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, 3953142 + ... + 3988315.

It is an arithmetic number, because the mean of its divisors is an integer number (17907987790).

Almost surely, 2^139666404259 is an apocalyptic number.

139666404259 is a deficient number, since it is larger than the sum of its proper divisors (3597498061).

139666404259 is an equidigital number, since it uses as much as digits as its factorization.

139666404259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7941909.

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 139666404259 in words is "one hundred thirty-nine billion, six hundred sixty-six million, four hundred four thousand, two hundred fifty-nine".