66467691254 has 4 divisors (see below), whose sum is σ = 99701536884. Its totient is φ = 33233845626.

The previous prime is 66467691239. The next prime is 66467691313. The reversal of 66467691254 is 45219676466.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66467691254.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16616922812 + ... + 16616922815.

It is an arithmetic number, because the mean of its divisors is an integer number (24925384221).

Almost surely, 2^66467691254 is an apocalyptic number.

66467691254 is a deficient number, since it is larger than the sum of its proper divisors (33233845630).

66467691254 is a wasteful number, since it uses less digits than its factorization.

66467691254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33233845629.

The product of its digits is 13063680, while the sum is 56.

The spelling of 66467691254 in words is "sixty-six billion, four hundred sixty-seven million, six hundred ninety-one thousand, two hundred fifty-four".