2661310651 has 2 divisors, whose sum is σ = 2661310652. Its totient is φ = 2661310650.

The previous prime is 2661310637. The next prime is 2661310667. The reversal of 2661310651 is 1560131662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2661310651 - 2³¹ = 513827003 is a prime.

It is a super-2 number, since 2×2661310651² = 14165148762252087602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2661310681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330655325 + 1330655326.

It is an arithmetic number, because the mean of its divisors is an integer number (1330655326).

Almost surely, 2^2661310651 is an apocalyptic number.

2661310651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661310651 is an equidigital number, since it uses as much as digits as its factorization.

2661310651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2661310651 is about 51587.8924845743. The cubic root of 2661310651 is about 1385.7935129701.

The spelling of 2661310651 in words is "two billion, six hundred sixty-one million, three hundred ten thousand, six hundred fifty-one".