77766763507401 has 8 divisors (see below), whose sum is σ = 103691185477920. Its totient is φ = 51843425270912.

The previous prime is 77766763507387. The next prime is 77766763507427. The reversal of 77766763507401 is 10470536766777.

It is a happy number.

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 77766763507401 - 2⁵ = 77766763507369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77766763507471) 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, 270766056 + ... + 271053113.

It is an arithmetic number, because the mean of its divisors is an integer number (12961398184740).

Almost surely, 2^{77766763507401} is an apocalyptic number.

It is an amenable number.

77766763507401 is a deficient number, since it is larger than the sum of its proper divisors (25924421970519).

77766763507401 is a wasteful number, since it uses less digits than its factorization.

77766763507401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541867015.

The product of its (nonzero) digits is 217818720, while the sum is 66.

The spelling of 77766763507401 in words is "seventy-seven trillion, seven hundred sixty-six billion, seven hundred sixty-three million, five hundred seven thousand, four hundred one".