6621677545 has 16 divisors (see below), whose sum is σ = 9094146048. Its totient is φ = 4534084800.

The previous prime is 6621677539. The next prime is 6621677563. The reversal of 6621677545 is 5457761266.

It is not a de Polignac number, because 6621677545 - 2¹¹ = 6621675497 is a prime.

It is a super-2 number, since 2×6621677545² = 87693227019914454050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110409 + ... + 159478.

It is an arithmetic number, because the mean of its divisors is an integer number (568384128).

Almost surely, 2^6621677545 is an apocalyptic number.

It is an amenable number.

6621677545 is a deficient number, since it is larger than the sum of its proper divisors (2472468503).

6621677545 is a wasteful number, since it uses less digits than its factorization.

6621677545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270600.

The product of its digits is 2116800, while the sum is 49.

The square root of 6621677545 is about 81373.6907421557. The cubic root of 6621677545 is about 1877.8288600732.

The spelling of 6621677545 in words is "six billion, six hundred twenty-one million, six hundred seventy-seven thousand, five hundred forty-five".