7965866 has 16 divisors (see below), whose sum is σ = 12559104. Its totient is φ = 3782064.

The previous prime is 7965863. The next prime is 7965871. The reversal of 7965866 is 6685697.

It is a super-2 number, since 2×7965866² = 126910042259912, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7965866.

It is not an unprimeable number, because it can be changed into a prime (7965863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6671 + ... + 7773.

It is an arithmetic number, because the mean of its divisors is an integer number (784944).

Almost surely, 2^7965866 is an apocalyptic number.

7965866 is a deficient number, since it is larger than the sum of its proper divisors (4593238).

7965866 is a wasteful number, since it uses less digits than its factorization.

7965866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285.

The product of its digits is 544320, while the sum is 47.

The square root of 7965866 is about 2822.3865787663. The cubic root of 7965866 is about 199.7151444793.

The spelling of 7965866 in words is "seven million, nine hundred sixty-five thousand, eight hundred sixty-six".