667738554652 has 36 divisors (see below), whose sum is σ = 1265808621000. Its totient is φ = 308074059072.

The previous prime is 667738554643. The next prime is 667738554793. The reversal of 667738554652 is 256455837766.

It is a super-3 number, since 3×667738554652³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1678663 + ... + 2037985.

Almost surely, 2^667738554652 is an apocalyptic number.

It is an amenable number.

667738554652 is a deficient number, since it is larger than the sum of its proper divisors (598070066348).

667738554652 is a wasteful number, since it uses less digits than its factorization.

667738554652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362102 (or 362087 counting only the distinct ones).

The product of its digits is 254016000, while the sum is 64.

The spelling of 667738554652 in words is "six hundred sixty-seven billion, seven hundred thirty-eight million, five hundred fifty-four thousand, six hundred fifty-two".