797961666 has 16 divisors (see below), whose sum is σ = 1622973600. Its totient is φ = 261478848.

The previous prime is 797961649. The next prime is 797961683. The reversal of 797961666 is 666169797.

It is an interprime number because it is at equal distance from previous prime (797961649) and next prime (797961683).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1126711 + ... + 1127418.

It is an arithmetic number, because the mean of its divisors is an integer number (101435850).

Almost surely, 2^797961666 is an apocalyptic number.

797961666 is an abundant number, since it is smaller than the sum of its proper divisors (825011934).

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

797961666 is a wasteful number, since it uses less digits than its factorization.

797961666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254193.

The product of its digits is 5143824, while the sum is 57.

The square root of 797961666 is about 28248.2152710574. The cubic root of 797961666 is about 927.5286704641.

The spelling of 797961666 in words is "seven hundred ninety-seven million, nine hundred sixty-one thousand, six hundred sixty-six".