660543404 has 24 divisors (see below), whose sum is σ = 1173942000. Its totient is φ = 325163520.

The previous prime is 660543337. The next prime is 660543451. The reversal of 660543404 is 404345066.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81947 + ... + 89645.

It is an arithmetic number, because the mean of its divisors is an integer number (48914250).

Almost surely, 2^660543404 is an apocalyptic number.

It is an amenable number.

660543404 is a deficient number, since it is larger than the sum of its proper divisors (513398596).

660543404 is a wasteful number, since it uses less digits than its factorization.

660543404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8033 (or 8031 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 660543404 is about 25701.0389673258. The cubic root of 660543404 is about 870.8976527897.

The spelling of 660543404 in words is "six hundred sixty million, five hundred forty-three thousand, four hundred four".