561276066 has 16 divisors (see below), whose sum is σ = 1208902464. Its totient is φ = 172700304.

The previous prime is 561276043. The next prime is 561276137. The reversal of 561276066 is 660672165.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3597846 + ... + 3598001.

It is an arithmetic number, because the mean of its divisors is an integer number (75556404).

Almost surely, 2^561276066 is an apocalyptic number.

561276066 is an abundant number, since it is smaller than the sum of its proper divisors (647626398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561276066 is a wasteful number, since it uses less digits than its factorization.

561276066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7195865.

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

The square root of 561276066 is about 23691.2656057037. The cubic root of 561276066 is about 824.8826602629.

The spelling of 561276066 in words is "five hundred sixty-one million, two hundred seventy-six thousand, sixty-six".