77665846801 has 8 divisors (see below), whose sum is σ = 78544391240. Its totient is φ = 76788891648.

The previous prime is 77665846799. The next prime is 77665846813. The reversal of 77665846801 is 10864856677.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 116964225 + 77548882576 = 10815^2 + 278476^2 .

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 77665846801 - 2¹ = 77665846799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77665846201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298896 + ... + 494641.

It is an arithmetic number, because the mean of its divisors is an integer number (9818048905).

Almost surely, 2^77665846801 is an apocalyptic number.

It is an amenable number.

77665846801 is a deficient number, since it is larger than the sum of its proper divisors (878544439).

77665846801 is a wasteful number, since it uses less digits than its factorization.

77665846801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794643.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 77665846801 in words is "seventy-seven billion, six hundred sixty-five million, eight hundred forty-six thousand, eight hundred one".