6649807546 has 8 divisors (see below), whose sum is σ = 9978098004. Its totient is φ = 3323774880.

The previous prime is 6649807537. The next prime is 6649807583. The reversal of 6649807546 is 6457089466.

It can be written as a sum of positive squares in 2 ways, for example, as 6648608521 + 1199025 = 81539^2 + 1095^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557065 + ... + 568876.

Almost surely, 2^6649807546 is an apocalyptic number.

6649807546 is a deficient number, since it is larger than the sum of its proper divisors (3328290458).

6649807546 is a wasteful number, since it uses less digits than its factorization.

6649807546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128896.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The square root of 6649807546 is about 81546.3521317784. The cubic root of 6649807546 is about 1880.4842145306.

The spelling of 6649807546 in words is "six billion, six hundred forty-nine million, eight hundred seven thousand, five hundred forty-six".