660054381 has 8 divisors (see below), whose sum is σ = 1005797184. Its totient is φ = 377173920.

The previous prime is 660054377. The next prime is 660054383. The reversal of 660054381 is 183450066.

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

It is not a de Polignac number, because 660054381 - 2² = 660054377 is a prime.

It is a super-2 number, since 2×660054381² = 871343571754586322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660054383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15715560 + ... + 15715601.

It is an arithmetic number, because the mean of its divisors is an integer number (125724648).

Almost surely, 2^660054381 is an apocalyptic number.

It is an amenable number.

660054381 is a deficient number, since it is larger than the sum of its proper divisors (345742803).

660054381 is a wasteful number, since it uses less digits than its factorization.

660054381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31431171.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 660054381 is about 25691.5235243066. The cubic root of 660054381 is about 870.6826812356.

The spelling of 660054381 in words is "six hundred sixty million, fifty-four thousand, three hundred eighty-one".