83720866351 has 8 divisors (see below), whose sum is σ = 84236673024. Its totient is φ = 83205232440.

The previous prime is 83720866343. The next prime is 83720866459. The reversal of 83720866351 is 15366802738.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83720866351 - 2³ = 83720866343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83720866295 and 83720866304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83720866051) 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, 1007286 + ... + 1087228.

It is an arithmetic number, because the mean of its divisors is an integer number (10529584128).

Almost surely, 2^83720866351 is an apocalyptic number.

83720866351 is a deficient number, since it is larger than the sum of its proper divisors (515806673).

83720866351 is a wasteful number, since it uses less digits than its factorization.

83720866351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86381.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 83720866351 in words is "eighty-three billion, seven hundred twenty million, eight hundred sixty-six thousand, three hundred fifty-one".