667703310673 has 12 divisors (see below), whose sum is σ = 778151831412. Its totient is φ = 571259213280.

The previous prime is 667703310623. The next prime is 667703310689. The reversal of 667703310673 is 376013307766.

It can be written as a sum of positive squares in 2 ways, for example, as 332343026064 + 335360284609 = 576492^2 + 579103^2 .

It is not a de Polignac number, because 667703310673 - 2¹³ = 667703302481 is a prime.

It is a super-2 number, since 2×667703310673² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667703310623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12567390 + ... + 12620407.

It is an arithmetic number, because the mean of its divisors is an integer number (64845985951).

Almost surely, 2^667703310673 is an apocalyptic number.

It is an amenable number.

667703310673 is a deficient number, since it is larger than the sum of its proper divisors (110448520739).

667703310673 is a wasteful number, since it uses less digits than its factorization.

667703310673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25188352 (or 25188345 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 49.

The spelling of 667703310673 in words is "six hundred sixty-seven billion, seven hundred three million, three hundred ten thousand, six hundred seventy-three".