66126538005 has 16 divisors (see below), whose sum is σ = 115420866624. Its totient is φ = 32061351680.

The previous prime is 66126538003. The next prime is 66126538007. The reversal of 66126538005 is 50083562166.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66126538003) and next prime (66126538007).

It is not a de Polignac number, because 66126538005 - 2¹ = 66126538003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66126538003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200383284 + ... + 200383613.

It is an arithmetic number, because the mean of its divisors is an integer number (7213804164).

Almost surely, 2^66126538005 is an apocalyptic number.

It is an amenable number.

66126538005 is a deficient number, since it is larger than the sum of its proper divisors (49294328619).

66126538005 is a wasteful number, since it uses less digits than its factorization.

66126538005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400766916.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 66126538005 in words is "sixty-six billion, one hundred twenty-six million, five hundred thirty-eight thousand, five".