68421670 has 8 divisors (see below), whose sum is σ = 123159024. Its totient is φ = 27368664.

The previous prime is 68421649. The next prime is 68421671. The reversal of 68421670 is 7612486.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68421671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3421074 + ... + 3421093.

It is an arithmetic number, because the mean of its divisors is an integer number (15394878).

Almost surely, 2^68421670 is an apocalyptic number.

68421670 is a deficient number, since it is larger than the sum of its proper divisors (54737354).

68421670 is a wasteful number, since it uses less digits than its factorization.

68421670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6842174.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 68421670 is about 8271.7392367023. The cubic root of 68421670 is about 409.0074543868.

The spelling of 68421670 in words is "sixty-eight million, four hundred twenty-one thousand, six hundred seventy".