126663340165 has 8 divisors (see below), whose sum is σ = 157237250040. Its totient is φ = 97836510912.

The previous prime is 126663340147. The next prime is 126663340211. The reversal of 126663340165 is 561043366621.

It can be written as a sum of positive squares in 4 ways, for example, as 11705725249 + 114957614916 = 108193^2 + 339054^2 .

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 126663340165 - 2¹⁷ = 126663209093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436769994 + ... + 436770283.

It is an arithmetic number, because the mean of its divisors is an integer number (19654656255).

Almost surely, 2^126663340165 is an apocalyptic number.

It is an amenable number.

126663340165 is a deficient number, since it is larger than the sum of its proper divisors (30573909875).

126663340165 is an equidigital number, since it uses as much as digits as its factorization.

126663340165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873540311.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 126663340165 in words is "one hundred twenty-six billion, six hundred sixty-three million, three hundred forty thousand, one hundred sixty-five".