68636766 has 24 divisors (see below), whose sum is σ = 150889032. Its totient is φ = 20798800.

The previous prime is 68636753. The next prime is 68636791. The reversal of 68636766 is 66763686.

It is a happy number.

It is a super-2 number, since 2×68636766² = 9422011293877512, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46545 + ... + 47996.

It is an arithmetic number, because the mean of its divisors is an integer number (6287043).

Almost surely, 2^68636766 is an apocalyptic number.

68636766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

68636766 is an abundant number, since it is smaller than the sum of its proper divisors (82252266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68636766 is a wasteful number, since it uses less digits than its factorization.

68636766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94568 (or 94557 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 48.

The square root of 68636766 is about 8284.7308948450. The cubic root of 68636766 is about 409.4356025582.

Subtracting from 68636766 its reverse (66763686), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 68636766 in words is "sixty-eight million, six hundred thirty-six thousand, seven hundred sixty-six".