381270666 has 24 divisors (see below), whose sum is σ = 887038560. Its totient is φ = 108934392.

The previous prime is 381270649. The next prime is 381270691. The reversal of 381270666 is 666072183.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 648126 + ... + 648713.

It is an arithmetic number, because the mean of its divisors is an integer number (36959940).

Almost surely, 2^381270666 is an apocalyptic number.

381270666 is an abundant number, since it is smaller than the sum of its proper divisors (505767894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381270666 is a wasteful number, since it uses less digits than its factorization.

381270666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296858 (or 1296851 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 381270666 is about 19526.1533846275. The cubic root of 381270666 is about 725.1220823349.

The spelling of 381270666 in words is "three hundred eighty-one million, two hundred seventy thousand, six hundred sixty-six".