68421755 has 8 divisors (see below), whose sum is σ = 86427600. Its totient is φ = 51856416.

The previous prime is 68421733. The next prime is 68421761. The reversal of 68421755 is 55712486.

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 68421755 - 2¹⁰ = 68420731 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360020 + ... + 360209.

It is an arithmetic number, because the mean of its divisors is an integer number (10803450).

Almost surely, 2^68421755 is an apocalyptic number.

68421755 is a deficient number, since it is larger than the sum of its proper divisors (18005845).

68421755 is a wasteful number, since it uses less digits than its factorization.

68421755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720253.

The product of its digits is 67200, while the sum is 38.

The square root of 68421755 is about 8271.7443746770. The cubic root of 68421755 is about 409.0076237562.

The spelling of 68421755 in words is "sixty-eight million, four hundred twenty-one thousand, seven hundred fifty-five".