78966419 has 8 divisors (see below), whose sum is σ = 90582528. Its totient is φ = 67434120.

The previous prime is 78966409. The next prime is 78966421. The reversal of 78966419 is 91466987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78966419 - 2⁴ = 78966403 is a prime.

It is a super-2 number, since 2×78966419² = 12471390659367122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (78966409) 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, 18917 + ... + 22710.

It is an arithmetic number, because the mean of its divisors is an integer number (11322816).

Almost surely, 2^78966419 is an apocalyptic number.

78966419 is a deficient number, since it is larger than the sum of its proper divisors (11616109).

78966419 is a wasteful number, since it uses less digits than its factorization.

78966419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41905.

The product of its digits is 653184, while the sum is 50.

The square root of 78966419 is about 8886.3051376824. The cubic root of 78966419 is about 429.0232363171.

The spelling of 78966419 in words is "seventy-eight million, nine hundred sixty-six thousand, four hundred nineteen".