69720055 has 8 divisors (see below), whose sum is σ = 83713392. Its totient is φ = 55743168.

The previous prime is 69720047. The next prime is 69720059. The reversal of 69720055 is 55002796.

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 69720055 - 2³ = 69720047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69720055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69720059) 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, 9052 + ... + 14878.

It is an arithmetic number, because the mean of its divisors is an integer number (10464174).

Almost surely, 2^69720055 is an apocalyptic number.

69720055 is a deficient number, since it is larger than the sum of its proper divisors (13993337).

69720055 is a wasteful number, since it uses less digits than its factorization.

69720055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8225.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 69720055 is about 8349.8535915308. The cubic root of 69720055 is about 411.5783991960.

The spelling of 69720055 in words is "sixty-nine million, seven hundred twenty thousand, fifty-five".