68660100 has 54 divisors (see below), whose sum is σ = 215214090. Its totient is φ = 18309120.

The previous prime is 68660089. The next prime is 68660101. The reversal of 68660100 is 106686.

It can be written as a sum of positive squares in 3 ways, for example, as 2304 + 68657796 = 48^2 + 8286^2 .

It is not an unprimeable number, because it can be changed into a prime (68660101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 37245 + ... + 39044.

Almost surely, 2^68660100 is an apocalyptic number.

68660100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68660100 is an abundant number, since it is smaller than the sum of its proper divisors (146553990).

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

68660100 is a wasteful number, since it uses less digits than its factorization.

68660100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76309 (or 76299 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 68660100 is about 8286.1390285223. The cubic root of 68660100 is about 409.4819950310.

Adding to 68660100 its reverse (106686), we get a palindrome (68766786).

The spelling of 68660100 in words is "sixty-eight million, six hundred sixty thousand, one hundred".