77466221 has 8 divisors (see below), whose sum is σ = 91585920. Its totient is φ = 64109808.

The previous prime is 77466187. The next prime is 77466227. The reversal of 77466221 is 12266477.

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

It is a de Polignac number, because none of the positive numbers 2^k-77466221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77466227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190601 + ... + 191006.

It is an arithmetic number, because the mean of its divisors is an integer number (11448240).

Almost surely, 2^77466221 is an apocalyptic number.

It is an amenable number.

77466221 is a deficient number, since it is larger than the sum of its proper divisors (14119699).

77466221 is a wasteful number, since it uses less digits than its factorization.

77466221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381643.

The product of its digits is 28224, while the sum is 35.

The square root of 77466221 is about 8801.4897034536. The cubic root of 77466221 is about 426.2889973293.

The spelling of 77466221 in words is "seventy-seven million, four hundred sixty-six thousand, two hundred twenty-one".