71668620996 has 192 divisors, whose sum is σ = 205626193920. Its totient is φ = 19024896384.

The previous prime is 71668620983. The next prime is 71668620997. The reversal of 71668620996 is 69902686617.

It is not an unprimeable number, because it can be changed into a prime (71668620997) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30535095 + ... + 30537441.

It is an arithmetic number, because the mean of its divisors is an integer number (1070969760).

Almost surely, 2^71668620996 is an apocalyptic number.

71668620996 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71668620996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102813096960).

71668620996 is an abundant number, since it is smaller than the sum of its proper divisors (133957572924).

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

71668620996 is a wasteful number, since it uses less digits than its factorization.

71668620996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471 (or 2431 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 71668620996 in words is "seventy-one billion, six hundred sixty-eight million, six hundred twenty thousand, nine hundred ninety-six".