66408054127 has 4 divisors (see below), whose sum is σ = 67017302440. Its totient is φ = 65798805816.

The previous prime is 66408054103. The next prime is 66408054131. The reversal of 66408054127 is 72145080466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66408054127 - 2²⁷ = 66273836399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66408055127) 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, 304623993 + ... + 304624210.

It is an arithmetic number, because the mean of its divisors is an integer number (16754325610).

Almost surely, 2^66408054127 is an apocalyptic number.

66408054127 is a deficient number, since it is larger than the sum of its proper divisors (609248313).

66408054127 is a wasteful number, since it uses less digits than its factorization.

66408054127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609248312.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 66408054127 in words is "sixty-six billion, four hundred eight million, fifty-four thousand, one hundred twenty-seven".