68665826 has 4 divisors (see below), whose sum is σ = 102998742. Its totient is φ = 34332912.

The previous prime is 68665811. The next prime is 68665847. The reversal of 68665826 is 62856686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62856686 = 2 ⋅31428343.

It can be written as a sum of positive squares in only one way, i.e., 53071225 + 15594601 = 7285^2 + 3949^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17166455 + ... + 17166458.

Almost surely, 2^68665826 is an apocalyptic number.

68665826 is a deficient number, since it is larger than the sum of its proper divisors (34332916).

68665826 is a wasteful number, since it uses less digits than its factorization.

68665826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34332915.

The product of its digits is 829440, while the sum is 47.

The square root of 68665826 is about 8286.4845380897. The cubic root of 68665826 is about 409.4933778124.

The spelling of 68665826 in words is "sixty-eight million, six hundred sixty-five thousand, eight hundred twenty-six".