68645810 has 8 divisors (see below), whose sum is σ = 123562476. Its totient is φ = 27458320.

The previous prime is 68645809. The next prime is 68645821. The reversal of 68645810 is 1854686.

It can be written as a sum of positive squares in 2 ways, for example, as 65593801 + 3052009 = 8099^2 + 1747^2 .

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

It is a super-2 number, since 2×68645810² = 9424494461112200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3432281 + ... + 3432300.

Almost surely, 2^68645810 is an apocalyptic number.

68645810 is a deficient number, since it is larger than the sum of its proper divisors (54916666).

68645810 is a wasteful number, since it uses less digits than its factorization.

68645810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6864588.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 68645810 is about 8285.2767002678. The cubic root of 68645810 is about 409.4535850146.

The spelling of 68645810 in words is "sixty-eight million, six hundred forty-five thousand, eight hundred ten".