63660990 has 32 divisors (see below), whose sum is σ = 153117216. Its totient is φ = 16939520.

The previous prime is 63660977. The next prime is 63661049. The reversal of 63660990 is 9906636.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 13594 + ... + 17666.

It is an arithmetic number, because the mean of its divisors is an integer number (4784913).

Almost surely, 2^63660990 is an apocalyptic number.

63660990 is an abundant number, since it is smaller than the sum of its proper divisors (89456226).

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

63660990 is a wasteful number, since it uses less digits than its factorization.

63660990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 63660990 is about 7978.7837418995. The cubic root of 63660990 is about 399.2924784376.

The spelling of 63660990 in words is "sixty-three million, six hundred sixty thousand, nine hundred ninety".