997668622611 has 24 divisors (see below), whose sum is σ = 1461997555200. Its totient is φ = 655464726000.

The previous prime is 997668622579. The next prime is 997668622627. The reversal of 997668622611 is 116226866799.

997668622611 is a `hidden beast` number, since 9 + 9 + 7 + 6 + 6 + 8 + 6 + 2 + 2 + 611 = 666.

It is not a de Polignac number, because 997668622611 - 2⁵ = 997668622579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997668222611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1170240 + ... + 1834338.

It is an arithmetic number, because the mean of its divisors is an integer number (60916564800).

Almost surely, 2^997668622611 is an apocalyptic number.

997668622611 is a deficient number, since it is larger than the sum of its proper divisors (464328932589).

997668622611 is a wasteful number, since it uses less digits than its factorization.

997668622611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666527 (or 666524 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 997668622611 in words is "nine hundred ninety-seven billion, six hundred sixty-eight million, six hundred twenty-two thousand, six hundred eleven".