660551652 has 24 divisors (see below), whose sum is σ = 1712541600. Its totient is φ = 220183848.

The previous prime is 660551621. The next prime is 660551653. The reversal of 660551652 is 256155066.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (660551653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3058002 + ... + 3058217.

It is an arithmetic number, because the mean of its divisors is an integer number (71355900).

Almost surely, 2^660551652 is an apocalyptic number.

It is an amenable number.

660551652 is an abundant number, since it is smaller than the sum of its proper divisors (1051989948).

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

660551652 is a wasteful number, since it uses less digits than its factorization.

660551652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6116232 (or 6116224 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 660551652 is about 25701.1994272641. The cubic root of 660551652 is about 870.9012776506.

The spelling of 660551652 in words is "six hundred sixty million, five hundred fifty-one thousand, six hundred fifty-two".