1665246970 has 16 divisors (see below), whose sum is σ = 2997910440. Its totient is φ = 665995264.

The previous prime is 1665246959. The next prime is 1665246971. The reversal of 1665246970 is 796425661.

It can be written as a sum of positive squares in 4 ways, for example, as 1081686321 + 583560649 = 32889^2 + 24157^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1665246970.

It is not an unprimeable number, because it can be changed into a prime (1665246971) 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, 112734 + ... + 126646.

Almost surely, 2^1665246970 is an apocalyptic number.

1665246970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665246970 is a deficient number, since it is larger than the sum of its proper divisors (1332663470).

1665246970 is a wasteful number, since it uses less digits than its factorization.

1665246970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25889.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 1665246970 is about 40807.4376799132. The cubic root of 1665246970 is about 1185.2943585595.

The spelling of 1665246970 in words is "one billion, six hundred sixty-five million, two hundred forty-six thousand, nine hundred seventy".