7966905678 has 24 divisors (see below), whose sum is σ = 17299418448. Its totient is φ = 2649821472.

The previous prime is 7966905677. The next prime is 7966905679. The reversal of 7966905678 is 8765096697.

7966905678 is a `hidden beast` number, since 7 + 9 + 6 + 69 + 0 + 567 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (7966905677) and next prime (7966905679).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7966905677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 476026 + ... + 492477.

It is an arithmetic number, because the mean of its divisors is an integer number (720809102).

Almost surely, 2^7966905678 is an apocalyptic number.

7966905678 is an abundant number, since it is smaller than the sum of its proper divisors (9332512770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7966905678 is a wasteful number, since it uses less digits than its factorization.

7966905678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968968 (or 968965 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 63.

The square root of 7966905678 is about 89257.5244895353. The cubic root of 7966905678 is about 1997.2383281729.

The spelling of 7966905678 in words is "seven billion, nine hundred sixty-six million, nine hundred five thousand, six hundred seventy-eight".