78954666 has 16 divisors (see below), whose sum is σ = 180467904. Its totient is φ = 22558464.

The previous prime is 78954611. The next prime is 78954677. The reversal of 78954666 is 66645987.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939895 + ... + 939978.

It is an arithmetic number, because the mean of its divisors is an integer number (11279244).

Almost surely, 2^78954666 is an apocalyptic number.

78954666 is an abundant number, since it is smaller than the sum of its proper divisors (101513238).

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

78954666 is a wasteful number, since it uses less digits than its factorization.

78954666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879885.

The product of its digits is 2177280, while the sum is 51.

The square root of 78954666 is about 8885.6438146034. The cubic root of 78954666 is about 429.0019506434.

It can be divided in two parts, 7895 and 4666, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 78954666 in words is "seventy-eight million, nine hundred fifty-four thousand, six hundred sixty-six".