68761660 has 24 divisors (see below), whose sum is σ = 157527216. Its totient is φ = 25004160.

The previous prime is 68761657. The next prime is 68761661. The reversal of 68761660 is 6616786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68761661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156057 + ... + 156496.

It is an arithmetic number, because the mean of its divisors is an integer number (6563634).

Almost surely, 2^68761660 is an apocalyptic number.

It is an amenable number.

68761660 is an abundant number, since it is smaller than the sum of its proper divisors (88765556).

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

68761660 is a wasteful number, since it uses less digits than its factorization.

68761660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312573 (or 312571 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 68761660 is about 8292.2650705341. The cubic root of 68761660 is about 409.6837934724.

The spelling of 68761660 in words is "sixty-eight million, seven hundred sixty-one thousand, six hundred sixty".