77766070617755 has 32 divisors (see below), whose sum is σ = 105806283186240. Its totient is φ = 54394870464000.

The previous prime is 77766070617751. The next prime is 77766070617761. The reversal of 77766070617755 is 55771607066777.

It is not a de Polignac number, because 77766070617755 - 2² = 77766070617751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77766070617751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1070369 + ... + 12517101.

It is an arithmetic number, because the mean of its divisors is an integer number (3306446349570).

Almost surely, 2^{77766070617755} is an apocalyptic number.

77766070617755 is a deficient number, since it is larger than the sum of its proper divisors (28040212568485).

77766070617755 is a wasteful number, since it uses less digits than its factorization.

77766070617755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11452271.

The product of its (nonzero) digits is 635304600, while the sum is 71.

The spelling of 77766070617755 in words is "seventy-seven trillion, seven hundred sixty-six billion, seventy million, six hundred seventeen thousand, seven hundred fifty-five".