6651640462 has 4 divisors (see below), whose sum is σ = 9977460696. Its totient is φ = 3325820230.

The previous prime is 6651640427. The next prime is 6651640483. The reversal of 6651640462 is 2640461566.

6651640462 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 1662910114 + ... + 1662910117.

It is an arithmetic number, because the mean of its divisors is an integer number (2494365174).

Almost surely, 2^6651640462 is an apocalyptic number.

6651640462 is a deficient number, since it is larger than the sum of its proper divisors (3325820234).

6651640462 is a wasteful number, since it uses less digits than its factorization.

6651640462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325820233.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 6651640462 is about 81557.5898491367. The cubic root of 6651640462 is about 1880.6569740652.

The spelling of 6651640462 in words is "six billion, six hundred fifty-one million, six hundred forty thousand, four hundred sixty-two".