661102759 has 2 divisors, whose sum is σ = 661102760. Its totient is φ = 661102758.

The previous prime is 661102751. The next prime is 661102829. The reversal of 661102759 is 957201166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 661102759 - 2³ = 661102751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661102751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330551379 + 330551380.

It is an arithmetic number, because the mean of its divisors is an integer number (330551380).

Almost surely, 2^661102759 is an apocalyptic number.

661102759 is a deficient number, since it is larger than the sum of its proper divisors (1).

661102759 is an equidigital number, since it uses as much as digits as its factorization.

661102759 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 661102759 is about 25711.9186176372. The cubic root of 661102759 is about 871.1434118182.

The spelling of 661102759 in words is "six hundred sixty-one million, one hundred two thousand, seven hundred fifty-nine".