667212608516 has 6 divisors (see below), whose sum is σ = 1167622064910. Its totient is φ = 333606304256.

The previous prime is 667212608479. The next prime is 667212608519. The reversal of 667212608516 is 615806212766.

It can be written as a sum of positive squares in only one way, i.e., 464033440000 + 203179168516 = 681200^2 + 450754^2 .

It is not an unprimeable number, because it can be changed into a prime (667212608519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83401576061 + ... + 83401576068.

It is an arithmetic number, because the mean of its divisors is an integer number (194603677485).

Almost surely, 2^667212608516 is an apocalyptic number.

It is an amenable number.

667212608516 is a deficient number, since it is larger than the sum of its proper divisors (500409456394).

667212608516 is a wasteful number, since it uses less digits than its factorization.

667212608516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166803152133 (or 166803152131 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 667212608516 in words is "six hundred sixty-seven billion, two hundred twelve million, six hundred eight thousand, five hundred sixteen".