77156666740 has 12 divisors (see below), whose sum is σ = 162029000196. Its totient is φ = 30862666688.

The previous prime is 77156666737. The next prime is 77156666771. The reversal of 77156666740 is 4766665177.

It can be written as a sum of positive squares in 2 ways, for example, as 60470744464 + 16685922276 = 245908^2 + 129174^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928916649 + ... + 1928916688.

It is an arithmetic number, because the mean of its divisors is an integer number (13502416683).

Almost surely, 2^77156666740 is an apocalyptic number.

It is an amenable number.

77156666740 is an abundant number, since it is smaller than the sum of its proper divisors (84872333456).

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

77156666740 is a wasteful number, since it uses less digits than its factorization.

77156666740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857833346 (or 3857833344 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 55.

The spelling of 77156666740 in words is "seventy-seven billion, one hundred fifty-six million, six hundred sixty-six thousand, seven hundred forty".