667701601031 has 8 divisors (see below), whose sum is σ = 690833060400. Its totient is φ = 644577292800.

The previous prime is 667701601027. The next prime is 667701601037. The reversal of 667701601031 is 130106107766.

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

It is not a de Polignac number, because 667701601031 - 2² = 667701601027 is a prime.

It is a super-2 number, since 2×667701601031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667701601037) 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, 1597466 + ... + 1971623.

It is an arithmetic number, because the mean of its divisors is an integer number (86354132550).

Almost surely, 2^667701601031 is an apocalyptic number.

667701601031 is a deficient number, since it is larger than the sum of its proper divisors (23131459369).

667701601031 is a wasteful number, since it uses less digits than its factorization.

667701601031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575569.

The product of its (nonzero) digits is 31752, while the sum is 38.

Adding to 667701601031 its reverse (130106107766), we get a palindrome (797807708797).

The spelling of 667701601031 in words is "six hundred sixty-seven billion, seven hundred one million, six hundred one thousand, thirty-one".