667674347445 has 32 divisors (see below), whose sum is σ = 1356544707840. Its totient is φ = 305222558400.

The previous prime is 667674347443. The next prime is 667674347477. The reversal of 667674347445 is 544743476766.

667674347445 is a `hidden beast` number, since 6 + 67 + 67 + 4 + 3 + 474 + 45 = 666.

It is not a de Polignac number, because 667674347445 - 2¹ = 667674347443 is a prime.

It is a super-2 number, since 2×667674347445² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667674347443) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 353265906 + ... + 353267795.

It is an arithmetic number, because the mean of its divisors is an integer number (42392022120).

Almost surely, 2^667674347445 is an apocalyptic number.

It is an amenable number.

667674347445 is an abundant number, since it is smaller than the sum of its proper divisors (688870360395).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667674347445 is a wasteful number, since it uses less digits than its factorization.

667674347445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706533722 (or 706533716 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 63.

The spelling of 667674347445 in words is "six hundred sixty-seven billion, six hundred seventy-four million, three hundred forty-seven thousand, four hundred forty-five".