6721054633 has 4 divisors (see below), whose sum is σ = 6723041220. Its totient is φ = 6719068048.

The previous prime is 6721054621. The next prime is 6721054643. The reversal of 6721054633 is 3364501276.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3238520464 + 3482534169 = 56908^2 + 59013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6721054633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6721054592 and 6721054601.

It is not an unprimeable number, because it can be changed into a prime (6721054643) 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, 988210 + ... + 994987.

It is an arithmetic number, because the mean of its divisors is an integer number (1680760305).

Almost surely, 2^6721054633 is an apocalyptic number.

It is an amenable number.

6721054633 is a deficient number, since it is larger than the sum of its proper divisors (1986587).

6721054633 is a wasteful number, since it uses less digits than its factorization.

6721054633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986586.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 6721054633 is about 81982.0384779495. The cubic root of 6721054633 is about 1887.1763059262.

The spelling of 6721054633 in words is "six billion, seven hundred twenty-one million, fifty-four thousand, six hundred thirty-three".