4997549666 has 8 divisors (see below), whose sum is σ = 7496818284. Its totient is φ = 2498610240.

The previous prime is 4997549647. The next prime is 4997549681. The reversal of 4997549666 is 6669457994.

It can be written as a sum of positive squares in 2 ways, for example, as 4975186225 + 22363441 = 70535^2 + 4729^2 .

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, 39995 + ... + 107678.

Almost surely, 2^4997549666 is an apocalyptic number.

4997549666 is a deficient number, since it is larger than the sum of its proper divisors (2499268618).

4997549666 is a wasteful number, since it uses less digits than its factorization.

4997549666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164596.

The product of its digits is 88179840, while the sum is 65.

The square root of 4997549666 is about 70693.3495174758. The cubic root of 4997549666 is about 1709.6965668867.

The spelling of 4997549666 in words is "four billion, nine hundred ninety-seven million, five hundred forty-nine thousand, six hundred sixty-six".