65197799676 has 144 divisors (see below), whose sum is σ = 170661411648. Its totient is φ = 20973158400.

The previous prime is 65197799671. The next prime is 65197799687. The reversal of 65197799676 is 67699779156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65197799671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101712316 + ... + 101712956.

It is an arithmetic number, because the mean of its divisors is an integer number (1185148692).

Almost surely, 2^65197799676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65197799676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85330705824).

65197799676 is an abundant number, since it is smaller than the sum of its proper divisors (105463611972).

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

65197799676 is a wasteful number, since it uses less digits than its factorization.

65197799676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1327 counting only the distinct ones).

The product of its digits is 270050760, while the sum is 72.

The spelling of 65197799676 in words is "sixty-five billion, one hundred ninety-seven million, seven hundred ninety-nine thousand, six hundred seventy-six".