791801772066 has 32 divisors (see below), whose sum is σ = 1761927765120. Its totient is φ = 263578683312.

The previous prime is 791801772043. The next prime is 791801772067. The reversal of 791801772066 is 660277108197.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (791801772067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9827305 + ... + 9907548.

It is an arithmetic number, because the mean of its divisors is an integer number (55060242660).

Almost surely, 2^791801772066 is an apocalyptic number.

791801772066 is an abundant number, since it is smaller than the sum of its proper divisors (970125993054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

791801772066 is a wasteful number, since it uses less digits than its factorization.

791801772066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19735607 (or 19735601 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 791801772066 in words is "seven hundred ninety-one billion, eight hundred one million, seven hundred seventy-two thousand, sixty-six".