6665078 has 24 divisors (see below), whose sum is σ = 12139632. Its totient is φ = 2731344.

The previous prime is 6665077. The next prime is 6665081. The reversal of 6665078 is 8705666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 776 + ... + 3732.

It is an arithmetic number, because the mean of its divisors is an integer number (505818).

Almost surely, 2^6665078 is an apocalyptic number.

6665078 is a deficient number, since it is larger than the sum of its proper divisors (5474554).

6665078 is a wasteful number, since it uses less digits than its factorization.

6665078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 2989 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 6665078 is about 2581.6812351644. The cubic root of 6665078 is about 188.1922546628.

It can be divided in two parts, 66650 and 78, that multiplied together give a triangular number (5198700 = T₃₂₂₄).

The spelling of 6665078 in words is "six million, six hundred sixty-five thousand, seventy-eight".