561666035 has 16 divisors (see below), whose sum is σ = 770966976. Its totient is φ = 384801408.

The previous prime is 561666023. The next prime is 561666041. The reversal of 561666035 is 530666165.

It is a cyclic number.

It is not a de Polignac number, because 561666035 - 2⁶ = 561665971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561666035.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36809 + ... + 49781.

It is an arithmetic number, because the mean of its divisors is an integer number (48185436).

Almost surely, 2^561666035 is an apocalyptic number.

561666035 is a deficient number, since it is larger than the sum of its proper divisors (209300941).

561666035 is a wasteful number, since it uses less digits than its factorization.

561666035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14222.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 561666035 is about 23699.4944038897. The cubic root of 561666035 is about 825.0736561113.

The spelling of 561666035 in words is "five hundred sixty-one million, six hundred sixty-six thousand, thirty-five".