663661070 has 16 divisors (see below), whose sum is σ = 1257463440. Its totient is φ = 251492544.

The previous prime is 663661057. The next prime is 663661073. The reversal of 663661070 is 70166366.

It is a happy number.

663661070 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 663661070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663661073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1746287 + ... + 1746666.

It is an arithmetic number, because the mean of its divisors is an integer number (78591465).

Almost surely, 2^663661070 is an apocalyptic number.

663661070 is a deficient number, since it is larger than the sum of its proper divisors (593802370).

663661070 is a wasteful number, since it uses less digits than its factorization.

663661070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492979.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 663661070 is about 25761.6200965700. The cubic root of 663661070 is about 872.2656716169.

The spelling of 663661070 in words is "six hundred sixty-three million, six hundred sixty-one thousand, seventy".