77066838 has 24 divisors (see below), whose sum is σ = 168635376. Its totient is φ = 25434000.

The previous prime is 77066827. The next prime is 77066861. The reversal of 77066838 is 83866077.

It is a junction number, because it is equal to n+sod(n) for n = 77066793 and 77066802.

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, 19378 + ... + 23013.

It is an arithmetic number, because the mean of its divisors is an integer number (7026474).

Almost surely, 2^77066838 is an apocalyptic number.

77066838 is an abundant number, since it is smaller than the sum of its proper divisors (91568538).

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

77066838 is a wasteful number, since it uses less digits than its factorization.

77066838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42500 (or 42497 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 77066838 is about 8778.7720097973. The cubic root of 77066838 is about 425.5551462791. Note that the first 3 decimals are identical.

The spelling of 77066838 in words is "seventy-seven million, sixty-six thousand, eight hundred thirty-eight".