6601639003 has 4 divisors (see below), whose sum is σ = 6692072488. Its totient is φ = 6511205520.

The previous prime is 6601638997. The next prime is 6601639061. The reversal of 6601639003 is 3009361066.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6601639003 - 2¹³ = 6601630811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6601639003.

It is not an unprimeable number, because it can be changed into a prime (6601639073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45216633 + ... + 45216778.

It is an arithmetic number, because the mean of its divisors is an integer number (1673018122).

Almost surely, 2^6601639003 is an apocalyptic number.

6601639003 is a deficient number, since it is larger than the sum of its proper divisors (90433485).

6601639003 is an equidigital number, since it uses as much as digits as its factorization.

6601639003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90433484.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 6601639003 is about 81250.4707863284. The cubic root of 6601639003 is about 1875.9327154891.

The spelling of 6601639003 in words is "six billion, six hundred one million, six hundred thirty-nine thousand, three".