1866740346 has 12 divisors (see below), whose sum is σ = 4044604122. Its totient is φ = 622246776.

The previous prime is 1866740341. The next prime is 1866740357. The reversal of 1866740346 is 6430476681.

It is a happy number.

1866740346 is a `hidden beast` number, since 186 + 67 + 403 + 4 + 6 = 666.

1866740346 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1631271321 + 235469025 = 40389^2 + 15345^2 .

It is not an unprimeable number, because it can be changed into a prime (1866740341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51853881 + ... + 51853916.

Almost surely, 2^1866740346 is an apocalyptic number.

1866740346 is an abundant number, since it is smaller than the sum of its proper divisors (2177863776).

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

1866740346 is a wasteful number, since it uses less digits than its factorization.

1866740346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103707805 (or 103707802 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 1866740346 is about 43205.7906535686. The cubic root of 1866740346 is about 1231.2927000196.

The spelling of 1866740346 in words is "one billion, eight hundred sixty-six million, seven hundred forty thousand, three hundred forty-six".