660454546 has 4 divisors (see below), whose sum is σ = 990681822. Its totient is φ = 330227272.

The previous prime is 660454541. The next prime is 660454583. The reversal of 660454546 is 645454066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 515517025 + 144937521 = 22705^2 + 12039^2 .

It is a super-2 number, since 2×660454546² = 872400414664132232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660454499 and 660454508.

It is not an unprimeable number, because it can be changed into a prime (660454541) 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 as a sum of consecutive naturals, namely, 165113635 + ... + 165113638.

Almost surely, 2^660454546 is an apocalyptic number.

660454546 is a deficient number, since it is larger than the sum of its proper divisors (330227276).

660454546 is a wasteful number, since it uses less digits than its factorization.

660454546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330227275.

The product of its (nonzero) digits is 345600, while the sum is 40.

The square root of 660454546 is about 25699.3102242064. The cubic root of 660454546 is about 870.8585992400.

The spelling of 660454546 in words is "six hundred sixty million, four hundred fifty-four thousand, five hundred forty-six".