6640702 has 4 divisors (see below), whose sum is σ = 9961056. Its totient is φ = 3320350.

The previous prime is 6640687. The next prime is 6640757. The reversal of 6640702 is 2070466.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660174 + ... + 1660177.

It is an arithmetic number, because the mean of its divisors is an integer number (2490264).

Almost surely, 2^6640702 is an apocalyptic number.

6640702 is a deficient number, since it is larger than the sum of its proper divisors (3320354).

6640702 is a wasteful number, since it uses less digits than its factorization.

6640702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320353.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 6640702 is about 2576.9559561622. The cubic root of 6640702 is about 187.9625510137.

The spelling of 6640702 in words is "six million, six hundred forty thousand, seven hundred two".