51660006061 has 4 divisors (see below), whose sum is σ = 51660582624. Its totient is φ = 51659429500.

The previous prime is 51660006059. The next prime is 51660006077. The reversal of 51660006061 is 16060006615.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51660006061 - 2¹ = 51660006059 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 (51660006031) 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, 121855 + ... + 343756.

It is an arithmetic number, because the mean of its divisors is an integer number (12915145656).

Almost surely, 2^51660006061 is an apocalyptic number.

It is an amenable number.

51660006061 is a deficient number, since it is larger than the sum of its proper divisors (576563).

51660006061 is a wasteful number, since it uses less digits than its factorization.

51660006061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576562.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 51660006061 in words is "fifty-one billion, six hundred sixty million, six thousand, sixty-one".