1778869066 has 16 divisors (see below), whose sum is σ = 2934699264. Its totient is φ = 803547504.

The previous prime is 1778869039. The next prime is 1778869067. The reversal of 1778869066 is 6609688771.

It is a self number, because there is not a number n which added to its sum of digits gives 1778869066.

It is not an unprimeable number, because it can be changed into a prime (1778869067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726630 + ... + 729073.

It is an arithmetic number, because the mean of its divisors is an integer number (183418704).

Almost surely, 2^1778869066 is an apocalyptic number.

1778869066 is a deficient number, since it is larger than the sum of its proper divisors (1155830198).

1778869066 is a wasteful number, since it uses less digits than its factorization.

1778869066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455765.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The square root of 1778869066 is about 42176.6412365897. The cubic root of 1778869066 is about 1211.6615531403.

The spelling of 1778869066 in words is "one billion, seven hundred seventy-eight million, eight hundred sixty-nine thousand, sixty-six".