947129617666 has 8 divisors (see below), whose sum is σ = 1420698565440. Its totient is φ = 473563429188.

The previous prime is 947129617649. The next prime is 947129617673. The reversal of 947129617666 is 666716921749.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×947129617666³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 947129617598 and 947129617607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915075 + ... + 1652761.

It is an arithmetic number, because the mean of its divisors is an integer number (177587320680).

Almost surely, 2^947129617666 is an apocalyptic number.

947129617666 is a deficient number, since it is larger than the sum of its proper divisors (473568947774).

947129617666 is a wasteful number, since it uses less digits than its factorization.

947129617666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379648.

The product of its digits is 41150592, while the sum is 64.

The spelling of 947129617666 in words is "nine hundred forty-seven billion, one hundred twenty-nine million, six hundred seventeen thousand, six hundred sixty-six".