73668967556 has 6 divisors (see below), whose sum is σ = 128920693230. Its totient is φ = 36834483776.

The previous prime is 73668967531. The next prime is 73668967607. The reversal of 73668967556 is 65576986637.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 52250645056 + 21418322500 = 228584^2 + 146350^2 .

It is a super-2 number, since 2×73668967556² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9208620941 + ... + 9208620948.

It is an arithmetic number, because the mean of its divisors is an integer number (21486782205).

Almost surely, 2^73668967556 is an apocalyptic number.

It is an amenable number.

73668967556 is a deficient number, since it is larger than the sum of its proper divisors (55251725674).

73668967556 is a wasteful number, since it uses less digits than its factorization.

73668967556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18417241893 (or 18417241891 counting only the distinct ones).

The product of its digits is 342921600, while the sum is 68.

The spelling of 73668967556 in words is "seventy-three billion, six hundred sixty-eight million, nine hundred sixty-seven thousand, five hundred fifty-six".