139666090481 has 8 divisors (see below), whose sum is σ = 140661813120. Its totient is φ = 138671711568.

The previous prime is 139666090441. The next prime is 139666090493. The reversal of 139666090481 is 184090666931.

139666090481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139666090481 is a prime.

It is a super-2 number, since 2×139666090481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139666090441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126851 + ... + 543528.

It is an arithmetic number, because the mean of its divisors is an integer number (17582726640).

Almost surely, 2^139666090481 is an apocalyptic number.

It is an amenable number.

139666090481 is a deficient number, since it is larger than the sum of its proper divisors (995722639).

139666090481 is a wasteful number, since it uses less digits than its factorization.

139666090481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671863.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 139666090481 in words is "one hundred thirty-nine billion, six hundred sixty-six million, ninety thousand, four hundred eighty-one".