76987633665661 has 8 divisors (see below), whose sum is σ = 80364039494400. Its totient is φ = 73667036197920.

The previous prime is 76987633665647. The next prime is 76987633665667. The reversal of 76987633665661 is 16656633678967.

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 76987633665661 - 2⁷ = 76987633665533 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 (76987633665667) 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, 13952087431 + ... + 13952092948.

It is an arithmetic number, because the mean of its divisors is an integer number (10045504936800).

Almost surely, 2^{76987633665661} is an apocalyptic number.

It is an amenable number.

76987633665661 is a deficient number, since it is larger than the sum of its proper divisors (3376405828739).

76987633665661 is a wasteful number, since it uses less digits than its factorization.

76987633665661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27904180499.

The product of its digits is 7407106560, while the sum is 79.

The spelling of 76987633665661 in words is "seventy-six trillion, nine hundred eighty-seven billion, six hundred thirty-three million, six hundred sixty-five thousand, six hundred sixty-one".