7779966 has 16 divisors (see below), whose sum is σ = 15600384. Its totient is φ = 2586584.

The previous prime is 7779943. The next prime is 7779979. The reversal of 7779966 is 6699777.

It is a super-2 number, since 2×7779966² = 121055741922312, which contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195 + ... + 4121.

It is an arithmetic number, because the mean of its divisors is an integer number (975024).

Almost surely, 2^7779966 is an apocalyptic number.

7779966 is an abundant number, since it is smaller than the sum of its proper divisors (7820418).

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

7779966 is a wasteful number, since it uses less digits than its factorization.

7779966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375.

The product of its digits is 1000188, while the sum is 51.

The square root of 7779966 is about 2789.2590413943. The cubic root of 7779966 is about 198.1493109052.

The spelling of 7779966 in words is "seven million, seven hundred seventy-nine thousand, nine hundred sixty-six".