380666881 has 16 divisors (see below), whose sum is σ = 459381760. Its totient is φ = 308143440.

The previous prime is 380666863. The next prime is 380666893. The reversal of 380666881 is 188666083.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 380666881 - 2⁵ = 380666849 is a prime.

It is a super-2 number, since 2×380666881² = 289814548580536322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (380666861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39700 + ... + 48346.

It is an arithmetic number, because the mean of its divisors is an integer number (28711360).

Almost surely, 2^380666881 is an apocalyptic number.

380666881 is the 11265-th hex number.

It is an amenable number.

380666881 is a deficient number, since it is larger than the sum of its proper divisors (78714879).

380666881 is a wasteful number, since it uses less digits than its factorization.

380666881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9004.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 380666881 is about 19510.6863282664. The cubic root of 380666881 is about 724.7391093008.

The spelling of 380666881 in words is "three hundred eighty million, six hundred sixty-six thousand, eight hundred eighty-one".