1678664466 has 32 divisors (see below), whose sum is σ = 3733862400. Its totient is φ = 559030320.

The previous prime is 1678664411. The next prime is 1678664467. The reversal of 1678664466 is 6644668761.

It is a happy number.

It is a super-2 number, since 2×1678664466² = 5635828778822130312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1678664467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45871 + ... + 73901.

It is an arithmetic number, because the mean of its divisors is an integer number (116683200).

Almost surely, 2^1678664466 is an apocalyptic number.

1678664466 is an abundant number, since it is smaller than the sum of its proper divisors (2055197934).

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

1678664466 is a wasteful number, since it uses less digits than its factorization.

1678664466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29151 (or 29145 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 1678664466 is about 40971.5079781060. The cubic root of 1678664466 is about 1188.4692947455.

The spelling of 1678664466 in words is "one billion, six hundred seventy-eight million, six hundred sixty-four thousand, four hundred sixty-six".