660594481 has 4 divisors (see below), whose sum is σ = 660857200. Its totient is φ = 660331764.

The previous prime is 660594463. The next prime is 660594499. The reversal of 660594481 is 184495066.

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 an interprime number because it is at equal distance from previous prime (660594463) and next prime (660594499).

It is a cyclic number.

It is not a de Polignac number, because 660594481 - 2¹¹ = 660592433 is a prime.

It is a super-2 number, since 2×660594481² = 872770136655318722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660594281) 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, 127551 + ... + 132628.

It is an arithmetic number, because the mean of its divisors is an integer number (165214300).

Almost surely, 2^660594481 is an apocalyptic number.

It is an amenable number.

660594481 is a deficient number, since it is larger than the sum of its proper divisors (262719).

660594481 is a wasteful number, since it uses less digits than its factorization.

660594481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262718.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 660594481 is about 25702.0326238996. The cubic root of 660594481 is about 870.9200998096.

The spelling of 660594481 in words is "six hundred sixty million, five hundred ninety-four thousand, four hundred eighty-one".