126966781673 has 4 divisors (see below), whose sum is σ = 126972643920. Its totient is φ = 126960919428.

The previous prime is 126966781651. The next prime is 126966781763. The reversal of 126966781673 is 376187669621.

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: 376187669621 = 39509 ⋅9521569.

It is a cyclic number.

It is not a de Polignac number, because 126966781673 - 2¹⁸ = 126966519529 is a prime.

It is a super-2 number, since 2×126966781673² (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 (126966783673) 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, 2898515 + ... + 2941992.

It is an arithmetic number, because the mean of its divisors is an integer number (31743160980).

Almost surely, 2^126966781673 is an apocalyptic number.

It is an amenable number.

126966781673 is a deficient number, since it is larger than the sum of its proper divisors (5862247).

126966781673 is an equidigital number, since it uses as much as digits as its factorization.

126966781673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862246.

The product of its digits is 27433728, while the sum is 62.

The spelling of 126966781673 in words is "one hundred twenty-six billion, nine hundred sixty-six million, seven hundred eighty-one thousand, six hundred seventy-three".