2749662821 has 8 divisors (see below), whose sum is σ = 2815796544. Its totient is φ = 2683628640.

The previous prime is 2749662803. The next prime is 2749662871. The reversal of 2749662821 is 1282669472.

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

It is a cyclic number.

It is not a de Polignac number, because 2749662821 - 2⁶ = 2749662757 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 (2749662871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32600 + ... + 81006.

It is an arithmetic number, because the mean of its divisors is an integer number (351974568).

Almost surely, 2^2749662821 is an apocalyptic number.

It is an amenable number.

2749662821 is a deficient number, since it is larger than the sum of its proper divisors (66133723).

2749662821 is a wasteful number, since it uses less digits than its factorization.

2749662821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49771.

The product of its digits is 580608, while the sum is 47.

The square root of 2749662821 is about 52437.2274343333. The cubic root of 2749662821 is about 1400.9624030589.

The spelling of 2749662821 in words is "two billion, seven hundred forty-nine million, six hundred sixty-two thousand, eight hundred twenty-one".