216674777 has 4 divisors (see below), whose sum is σ = 236372496. Its totient is φ = 196977060.

The previous prime is 216674761. The next prime is 216674819. The reversal of 216674777 is 777476612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216674777 - 2⁴ = 216674761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216674077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9848843 + ... + 9848864.

It is an arithmetic number, because the mean of its divisors is an integer number (59093124).

Almost surely, 2^216674777 is an apocalyptic number.

It is an amenable number.

216674777 is a deficient number, since it is larger than the sum of its proper divisors (19697719).

216674777 is a wasteful number, since it uses less digits than its factorization.

216674777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19697718.

The product of its digits is 691488, while the sum is 47.

The square root of 216674777 is about 14719.8769356269. The cubic root of 216674777 is about 600.6241440338.

The spelling of 216674777 in words is "two hundred sixteen million, six hundred seventy-four thousand, seven hundred seventy-seven".