1020665798 has 8 divisors (see below), whose sum is σ = 1534456008. Its totient is φ = 509180464.

The previous prime is 1020665791. The next prime is 1020665843. The reversal of 1020665798 is 8975660201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020665791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575111 + ... + 576882.

It is an arithmetic number, because the mean of its divisors is an integer number (191807001).

Almost surely, 2^1020665798 is an apocalyptic number.

1020665798 is a deficient number, since it is larger than the sum of its proper divisors (513790210).

1020665798 is a wasteful number, since it uses less digits than its factorization.

1020665798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152438.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1020665798 is about 31947.8606169490. The cubic root of 1020665798 is about 1006.8416839442.

The spelling of 1020665798 in words is "one billion, twenty million, six hundred sixty-five thousand, seven hundred ninety-eight".