1668264970 has 8 divisors (see below), whose sum is σ = 3002876964. Its totient is φ = 667305984.

The previous prime is 1668264967. The next prime is 1668264973. The reversal of 1668264970 is 794628661.

It is an interprime number because it is at equal distance from previous prime (1668264967) and next prime (1668264973).

It can be written as a sum of positive squares in 2 ways, for example, as 1620143001 + 48121969 = 40251^2 + 6937^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1668264973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83413239 + ... + 83413258.

Almost surely, 2^1668264970 is an apocalyptic number.

1668264970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668264970 is a deficient number, since it is larger than the sum of its proper divisors (1334611994).

1668264970 is a wasteful number, since it uses less digits than its factorization.

1668264970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166826504.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 1668264970 is about 40844.3994936882. The cubic root of 1668264970 is about 1186.0099800382.

The spelling of 1668264970 in words is "one billion, six hundred sixty-eight million, two hundred sixty-four thousand, nine hundred seventy".