77750370661 has 8 divisors (see below), whose sum is σ = 79170452480. Its totient is φ = 76342912128.

The previous prime is 77750370637. The next prime is 77750370703. The reversal of 77750370661 is 16607305777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77750370661 - 2⁵ = 77750370629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77750370161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3143391 + ... + 3168028.

It is an arithmetic number, because the mean of its divisors is an integer number (9896306560).

Almost surely, 2^77750370661 is an apocalyptic number.

It is an amenable number.

77750370661 is a deficient number, since it is larger than the sum of its proper divisors (1420081819).

77750370661 is a wasteful number, since it uses less digits than its factorization.

77750370661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311643.

The product of its (nonzero) digits is 1296540, while the sum is 49.

The spelling of 77750370661 in words is "seventy-seven billion, seven hundred fifty million, three hundred seventy thousand, six hundred sixty-one".