78720033 has 8 divisors (see below), whose sum is σ = 119954368. Its totient is φ = 44982864.

The previous prime is 78720029. The next prime is 78720049. The reversal of 78720033 is 33002787.

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

It is not a de Polignac number, because 78720033 - 2² = 78720029 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78720833) 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, 1874266 + ... + 1874307.

It is an arithmetic number, because the mean of its divisors is an integer number (14994296).

Almost surely, 2^78720033 is an apocalyptic number.

It is an amenable number.

78720033 is a deficient number, since it is larger than the sum of its proper divisors (41234335).

78720033 is a wasteful number, since it uses less digits than its factorization.

78720033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748583.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 78720033 is about 8872.4310648210. The cubic root of 78720033 is about 428.5765677638.

The spelling of 78720033 in words is "seventy-eight million, seven hundred twenty thousand, thirty-three".