1061666361 has 24 divisors (see below), whose sum is σ = 1828794240. Its totient is φ = 580288896.

The previous prime is 1061666357. The next prime is 1061666369. The reversal of 1061666361 is 1636661601.

It is a happy number.

It is not a de Polignac number, because 1061666361 - 2² = 1061666357 is a prime.

It is a super-2 number, since 2×1061666361² = 2254270924157964642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061666369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 364896 + ... + 367793.

It is an arithmetic number, because the mean of its divisors is an integer number (76199760).

Almost surely, 2^1061666361 is an apocalyptic number.

It is an amenable number.

1061666361 is a deficient number, since it is larger than the sum of its proper divisors (767127879).

1061666361 is a wasteful number, since it uses less digits than its factorization.

1061666361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732725 (or 732722 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1061666361 is about 32583.2220782414. Note that the first 3 decimals coincide. The cubic root of 1061666361 is about 1020.1468329564.

The spelling of 1061666361 in words is "one billion, sixty-one million, six hundred sixty-six thousand, three hundred sixty-one".