83966477820 has 96 divisors (see below), whose sum is σ = 237105308160. Its totient is φ = 22201086720.

The previous prime is 83966477801. The next prime is 83966477839. The reversal of 83966477820 is 2877466938.

It is an interprime number because it is at equal distance from previous prime (83966477801) and next prime (83966477839).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6841009 + ... + 6853271.

It is an arithmetic number, because the mean of its divisors is an integer number (2469846960).

Almost surely, 2^83966477820 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 83966477820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118552654080).

83966477820 is an abundant number, since it is smaller than the sum of its proper divisors (153138830340).

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

83966477820 is a wasteful number, since it uses less digits than its factorization.

83966477820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13235 (or 13233 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 60.

The spelling of 83966477820 in words is "eighty-three billion, nine hundred sixty-six million, four hundred seventy-seven thousand, eight hundred twenty".