664131167626342 has 16 divisors (see below), whose sum is σ = 1072857977971920. Its totient is φ = 306513303882912.

The previous prime is 664131167626321. The next prime is 664131167626343. The reversal of 664131167626342 is 243626761131466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664131167626343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364635913 + ... + 366452740.

It is an arithmetic number, because the mean of its divisors is an integer number (67053623623245).

Almost surely, 2^{664131167626342} is an apocalyptic number.

664131167626342 is a deficient number, since it is larger than the sum of its proper divisors (408726810345578).

664131167626342 is a wasteful number, since it uses less digits than its factorization.

664131167626342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731123607.

The product of its digits is 31352832, while the sum is 58.

The spelling of 664131167626342 in words is "six hundred sixty-four trillion, one hundred thirty-one billion, one hundred sixty-seven million, six hundred twenty-six thousand, three hundred forty-two".