667212601642 has 8 divisors (see below), whose sum is σ = 1053493581600. Its totient is φ = 316048074444.

The previous prime is 667212601621. The next prime is 667212601667. The reversal of 667212601642 is 246106212766.

667212601642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8779113142 + ... + 8779113217.

It is an arithmetic number, because the mean of its divisors is an integer number (131686697700).

Almost surely, 2^667212601642 is an apocalyptic number.

667212601642 is a deficient number, since it is larger than the sum of its proper divisors (386280979958).

667212601642 is a wasteful number, since it uses less digits than its factorization.

667212601642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17558226380.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 667212601642 in words is "six hundred sixty-seven billion, two hundred twelve million, six hundred one thousand, six hundred forty-two".