667162421654 has 8 divisors (see below), whose sum is σ = 1053414350040. Its totient is φ = 316024304976.

The previous prime is 667162421641. The next prime is 667162421707. The reversal of 667162421654 is 456124261766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 in 3 ways as a sum of consecutive naturals, for example, 8778452879 + ... + 8778452954.

It is an arithmetic number, because the mean of its divisors is an integer number (131676793755).

Almost surely, 2^667162421654 is an apocalyptic number.

667162421654 is a deficient number, since it is larger than the sum of its proper divisors (386251928386).

667162421654 is a wasteful number, since it uses less digits than its factorization.

667162421654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17556905854.

The product of its digits is 2903040, while the sum is 50.

The spelling of 667162421654 in words is "six hundred sixty-seven billion, one hundred sixty-two million, four hundred twenty-one thousand, six hundred fifty-four".