158066839781 has 4 divisors (see below), whose sum is σ = 158068293792. Its totient is φ = 158065385772.

The previous prime is 158066839771. The next prime is 158066839813. The reversal of 158066839781 is 187938660851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 187938660851 = 13999 ⋅13425149.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158066839781 is a prime.

It is a super-2 number, since 2×158066839781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158066839771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549491 + ... + 786176.

It is an arithmetic number, because the mean of its divisors is an integer number (39517073448).

Almost surely, 2^158066839781 is an apocalyptic number.

It is an amenable number.

158066839781 is a deficient number, since it is larger than the sum of its proper divisors (1454011).

158066839781 is a wasteful number, since it uses less digits than its factorization.

158066839781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454010.

The product of its (nonzero) digits is 17418240, while the sum is 62.

The spelling of 158066839781 in words is "one hundred fifty-eight billion, sixty-six million, eight hundred thirty-nine thousand, seven hundred eighty-one".