787636843066 has 4 divisors (see below), whose sum is σ = 1181455264602. Its totient is φ = 393818421532.

The previous prime is 787636843003. The next prime is 787636843093. The reversal of 787636843066 is 660348636787.

It is a happy number.

787636843066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 651767197041 + 135869646025 = 807321^2 + 368605^2 .

It is a junction number, because it is equal to n+sod(n) for n = 787636842989 and 787636843007.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196909210765 + ... + 196909210768.

Almost surely, 2^787636843066 is an apocalyptic number.

787636843066 is a deficient number, since it is larger than the sum of its proper divisors (393818421536).

787636843066 is a wasteful number, since it uses less digits than its factorization.

787636843066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393818421535.

The product of its (nonzero) digits is 146313216, while the sum is 64.

The spelling of 787636843066 in words is "seven hundred eighty-seven billion, six hundred thirty-six million, eight hundred forty-three thousand, sixty-six".