68352660 has 60 divisors (see below), whose sum is σ = 214429908. Its totient is φ = 18226944.

The previous prime is 68352611. The next prime is 68352673. The reversal of 68352660 is 6625386.

It can be written as a sum of positive squares in 2 ways, for example, as 31337604 + 37015056 = 5598^2 + 6084^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×68352660² = 9344172258151200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19477 + ... + 22716.

Almost surely, 2^68352660 is an apocalyptic number.

68352660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68352660 is an abundant number, since it is smaller than the sum of its proper divisors (146077248).

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

68352660 is a wasteful number, since it uses less digits than its factorization.

68352660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42214 (or 42203 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 68352660 is about 8267.5667520740. The cubic root of 68352660 is about 408.8699000165.

The spelling of 68352660 in words is "sixty-eight million, three hundred fifty-two thousand, six hundred sixty".