6640633363 has 8 divisors (see below), whose sum is σ = 8173087328. Its totient is φ = 5254127424.

The previous prime is 6640633339. The next prime is 6640633387. The reversal of 6640633363 is 3633360466.

It is an interprime number because it is at equal distance from previous prime (6640633339) and next prime (6640633387).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6640633363 - 2⁵ = 6640633331 is a prime.

It is a super-2 number, since 2×6640633363² = 88196022923577379538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6640603363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36486906 + ... + 36487087.

It is an arithmetic number, because the mean of its divisors is an integer number (1021635916).

Almost surely, 2^6640633363 is an apocalyptic number.

6640633363 is a deficient number, since it is larger than the sum of its proper divisors (1532453965).

6640633363 is a wasteful number, since it uses less digits than its factorization.

6640633363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72974013.

The product of its (nonzero) digits is 419904, while the sum is 40.

The square root of 6640633363 is about 81490.0813780426. The cubic root of 6640633363 is about 1879.6190343005.

The spelling of 6640633363 in words is "six billion, six hundred forty million, six hundred thirty-three thousand, three hundred sixty-three".