69766661 has 2 divisors, whose sum is σ = 69766662. Its totient is φ = 69766660.

The previous prime is 69766637. The next prime is 69766667. The reversal of 69766661 is 16666796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41357761 + 28408900 = 6431^2 + 5330^2 .

It is a cyclic number.

It is not a de Polignac number, because 69766661 - 2¹⁴ = 69750277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69766667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34883330 + 34883331.

It is an arithmetic number, because the mean of its divisors is an integer number (34883331).

Almost surely, 2^69766661 is an apocalyptic number.

It is an amenable number.

69766661 is a deficient number, since it is larger than the sum of its proper divisors (1).

69766661 is an equidigital number, since it uses as much as digits as its factorization.

69766661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 69766661 is about 8352.6439526655. The cubic root of 69766661 is about 411.6700885013.

The spelling of 69766661 in words is "sixty-nine million, seven hundred sixty-six thousand, six hundred sixty-one".