6640742302 has 4 divisors (see below), whose sum is σ = 9961113456. Its totient is φ = 3320371150.

The previous prime is 6640742293. The next prime is 6640742309. The reversal of 6640742302 is 2032470466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640742309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660185574 + ... + 1660185577.

It is an arithmetic number, because the mean of its divisors is an integer number (2490278364).

Almost surely, 2^6640742302 is an apocalyptic number.

6640742302 is a deficient number, since it is larger than the sum of its proper divisors (3320371154).

6640742302 is a wasteful number, since it uses less digits than its factorization.

6640742302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320371153.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 6640742302 is about 81490.7497940717. The cubic root of 6640742302 is about 1879.6293125720.

The spelling of 6640742302 in words is "six billion, six hundred forty million, seven hundred forty-two thousand, three hundred two".