7719817966 has 16 divisors (see below), whose sum is σ = 13660876800. Its totient is φ = 3201767640.

The previous prime is 7719817939. The next prime is 7719817969. The reversal of 7719817966 is 6697189177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7719817969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8893366 + ... + 8894233.

It is an arithmetic number, because the mean of its divisors is an integer number (853804800).

Almost surely, 2^7719817966 is an apocalyptic number.

7719817966 is a deficient number, since it is larger than the sum of its proper divisors (5941058834).

7719817966 is a wasteful number, since it uses less digits than its factorization.

7719817966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17787639.

The product of its digits is 8001504, while the sum is 61.

The square root of 7719817966 is about 87862.4946493098. The cubic root of 7719817966 is about 1976.3734902349.

The spelling of 7719817966 in words is "seven billion, seven hundred nineteen million, eight hundred seventeen thousand, nine hundred sixty-six".