6405772678 has 8 divisors (see below), whose sum is σ = 9843016680. Its totient is φ = 3124767120.

The previous prime is 6405772673. The next prime is 6405772753. The reversal of 6405772678 is 8762775046.

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

It is a super-2 number, since 2×6405772678² = 82067847204422583368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405772673) 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, 39059508 + ... + 39059671.

It is an arithmetic number, because the mean of its divisors is an integer number (1230377085).

Almost surely, 2^6405772678 is an apocalyptic number.

6405772678 is a deficient number, since it is larger than the sum of its proper divisors (3437244002).

6405772678 is a wasteful number, since it uses less digits than its factorization.

6405772678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78119222.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The square root of 6405772678 is about 80036.0711054709. The cubic root of 6405772678 is about 1857.1935823153.

The spelling of 6405772678 in words is "six billion, four hundred five million, seven hundred seventy-two thousand, six hundred seventy-eight".