6632778511 has 4 divisors (see below), whose sum is σ = 6693629800. Its totient is φ = 6571927224.

The previous prime is 6632778379. The next prime is 6632778521. The reversal of 6632778511 is 1158772366.

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

It is a cyclic number.

It is not a de Polignac number, because 6632778511 - 2⁹ = 6632777999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6632778521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30425481 + ... + 30425698.

It is an arithmetic number, because the mean of its divisors is an integer number (1673407450).

Almost surely, 2^6632778511 is an apocalyptic number.

6632778511 is a deficient number, since it is larger than the sum of its proper divisors (60851289).

6632778511 is a wasteful number, since it uses less digits than its factorization.

6632778511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60851288.

The product of its digits is 423360, while the sum is 46.

The square root of 6632778511 is about 81441.8719762752. The cubic root of 6632778511 is about 1878.8776414450.

The spelling of 6632778511 in words is "six billion, six hundred thirty-two million, seven hundred seventy-eight thousand, five hundred eleven".