6701661439 has 4 divisors (see below), whose sum is σ = 7310903400. Its totient is φ = 6092419480.

The previous prime is 6701661433. The next prime is 6701661481. The reversal of 6701661439 is 9341661076.

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 6701661439 - 2²⁵ = 6668107007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6701661395 and 6701661404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6701661433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304620964 + ... + 304620985.

It is an arithmetic number, because the mean of its divisors is an integer number (1827725850).

Almost surely, 2^6701661439 is an apocalyptic number.

6701661439 is a deficient number, since it is larger than the sum of its proper divisors (609241961).

6701661439 is a wasteful number, since it uses less digits than its factorization.

6701661439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609241960.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 6701661439 is about 81863.6759436076. The cubic root of 6701661439 is about 1885.3594465420.

The spelling of 6701661439 in words is "six billion, seven hundred one million, six hundred sixty-one thousand, four hundred thirty-nine".