68620855 has 4 divisors (see below), whose sum is σ = 82345032. Its totient is φ = 54896680.

The previous prime is 68620843. The next prime is 68620859. The reversal of 68620855 is 55802686.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-68620855 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68620859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6862081 + ... + 6862090.

It is an arithmetic number, because the mean of its divisors is an integer number (20586258).

Almost surely, 2^68620855 is an apocalyptic number.

68620855 is a deficient number, since it is larger than the sum of its proper divisors (13724177).

68620855 is a wasteful number, since it uses less digits than its factorization.

68620855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13724176.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 68620855 is about 8283.7705786677. The cubic root of 68620855 is about 409.4039624052.

The spelling of 68620855 in words is "sixty-eight million, six hundred twenty thousand, eight hundred fifty-five".