68177820 has 48 divisors (see below), whose sum is σ = 202130208. Its totient is φ = 17111040.

The previous prime is 68177807. The next prime is 68177867. The reversal of 68177820 is 2877186.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 32401 + ... + 34440.

It is an arithmetic number, because the mean of its divisors is an integer number (4211046).

Almost surely, 2^68177820 is an apocalyptic number.

68177820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68177820 is an abundant number, since it is smaller than the sum of its proper divisors (133952388).

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

68177820 is a wasteful number, since it uses less digits than its factorization.

68177820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66870 (or 66868 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 68177820 is about 8256.9861329664. The cubic root of 68177820 is about 408.5209847859.

The spelling of 68177820 in words is "sixty-eight million, one hundred seventy-seven thousand, eight hundred twenty".