663000061 has 4 divisors (see below), whose sum is σ = 664911072. Its totient is φ = 661089052.

The previous prime is 663000049. The next prime is 663000097. The reversal of 663000061 is 160000366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 663000061 - 2¹¹ = 662998013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 662999996 and 663000041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663000031) 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 in 3 ways as a sum of consecutive naturals, for example, 954985 + ... + 955678.

It is an arithmetic number, because the mean of its divisors is an integer number (166227768).

Almost surely, 2^663000061 is an apocalyptic number.

It is an amenable number.

663000061 is a deficient number, since it is larger than the sum of its proper divisors (1911011).

663000061 is a wasteful number, since it uses less digits than its factorization.

663000061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911010.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 663000061 is about 25748.7875636893. The cubic root of 663000061 is about 871.9759820875.

The spelling of 663000061 in words is "six hundred sixty-three million, sixty-one", and thus it is an aban number.