2651327661 has 16 divisors (see below), whose sum is σ = 3586793024. Its totient is φ = 1741751424.

The previous prime is 2651327647. The next prime is 2651327671. The reversal of 2651327661 is 1667231562.

It is not a de Polignac number, because 2651327661 - 2¹⁷ = 2651196589 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 (2651327671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266010 + ... + 275796.

It is an arithmetic number, because the mean of its divisors is an integer number (224174564).

Almost surely, 2^2651327661 is an apocalyptic number.

It is an amenable number.

2651327661 is a deficient number, since it is larger than the sum of its proper divisors (935465363).

2651327661 is a wasteful number, since it uses less digits than its factorization.

2651327661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11100.

The product of its digits is 90720, while the sum is 39.

The square root of 2651327661 is about 51491.0444737723. The cubic root of 2651327661 is about 1384.0585661688.

The spelling of 2651327661 in words is "two billion, six hundred fifty-one million, three hundred twenty-seven thousand, six hundred sixty-one".