6640964054 has 8 divisors (see below), whose sum is σ = 9971644968. Its totient is φ = 3317082400.

The previous prime is 6640964051. The next prime is 6640964063. The reversal of 6640964054 is 4504690466.

It is a happy number.

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

It is a super-2 number, since 2×6640964054² = 88204807133040229832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6640963996 and 6640964014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640964051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1697372 + ... + 1701279.

It is an arithmetic number, because the mean of its divisors is an integer number (1246455621).

Almost surely, 2^6640964054 is an apocalyptic number.

6640964054 is a deficient number, since it is larger than the sum of its proper divisors (3330680914).

6640964054 is a wasteful number, since it uses less digits than its factorization.

6640964054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399630.

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 6640964054 is about 81492.1103788581. The cubic root of 6640964054 is about 1879.6502342753.

The spelling of 6640964054 in words is "six billion, six hundred forty million, nine hundred sixty-four thousand, fifty-four".