797766166 has 4 divisors (see below), whose sum is σ = 1196649252. Its totient is φ = 398883082.

The previous prime is 797766127. The next prime is 797766197. The reversal of 797766166 is 661667797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 661667797 = 7 ⋅94523971.

It is a super-2 number, since 2×797766166² = 1272861711228679112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199441540 + ... + 199441543.

It is an arithmetic number, because the mean of its divisors is an integer number (299162313).

Almost surely, 2^797766166 is an apocalyptic number.

797766166 is a deficient number, since it is larger than the sum of its proper divisors (398883086).

797766166 is a wasteful number, since it uses less digits than its factorization.

797766166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398883085.

The product of its digits is 4000752, while the sum is 55.

The square root of 797766166 is about 28244.7546634769. The cubic root of 797766166 is about 927.4529163381.

The spelling of 797766166 in words is "seven hundred ninety-seven million, seven hundred sixty-six thousand, one hundred sixty-six".