68770645 has 4 divisors (see below), whose sum is σ = 82524780. Its totient is φ = 55016512.

The previous prime is 68770613. The next prime is 68770651. The reversal of 68770645 is 54607786.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30935844 + 37834801 = 5562^2 + 6151^2 .

It is a cyclic number.

It is not a de Polignac number, because 68770645 - 2⁵ = 68770613 is a prime.

It is a super-2 number, since 2×68770645² = 9458803227432050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6877060 + ... + 6877069.

It is an arithmetic number, because the mean of its divisors is an integer number (20631195).

Almost surely, 2^68770645 is an apocalyptic number.

It is an amenable number.

68770645 is a deficient number, since it is larger than the sum of its proper divisors (13754135).

68770645 is a wasteful number, since it uses less digits than its factorization.

68770645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13754134.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 68770645 is about 8292.8068227832. The cubic root of 68770645 is about 409.7016369847.

The spelling of 68770645 in words is "sixty-eight million, seven hundred seventy thousand, six hundred forty-five".