78223066 has 8 divisors (see below), whose sum is σ = 117768384. Its totient is φ = 38966940.

The previous prime is 78223051. The next prime is 78223097. The reversal of 78223066 is 66032287.

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

It is a super-2 number, since 2×78223066² = 12237696108880712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71620 + ... + 72703.

It is an arithmetic number, because the mean of its divisors is an integer number (14721048).

Almost surely, 2^78223066 is an apocalyptic number.

78223066 is a deficient number, since it is larger than the sum of its proper divisors (39545318).

78223066 is a wasteful number, since it uses less digits than its factorization.

78223066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144596.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 78223066 is about 8844.3804757597. The cubic root of 78223066 is about 427.6727817474.

The spelling of 78223066 in words is "seventy-eight million, two hundred twenty-three thousand, sixty-six".