1866965794 has 16 divisors (see below), whose sum is σ = 2813521536. Its totient is φ = 929134800.

The previous prime is 1866965777. The next prime is 1866965801. The reversal of 1866965794 is 4975696681.

It is a super-2 number, since 2×1866965794² = 6971122551932100872, which contains 22 as substring.

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, 512359 + ... + 515989.

It is an arithmetic number, because the mean of its divisors is an integer number (175845096).

Almost surely, 2^1866965794 is an apocalyptic number.

1866965794 is a deficient number, since it is larger than the sum of its proper divisors (946555742).

1866965794 is a wasteful number, since it uses less digits than its factorization.

1866965794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761.

The product of its digits is 19595520, while the sum is 61.

The square root of 1866965794 is about 43208.3995769341. The cubic root of 1866965794 is about 1231.3422661529.

The spelling of 1866965794 in words is "one billion, eight hundred sixty-six million, nine hundred sixty-five thousand, seven hundred ninety-four".