1665798070 has 32 divisors (see below), whose sum is σ = 3090672288. Its totient is φ = 646050048.

The previous prime is 1665798047. The next prime is 1665798073. The reversal of 1665798070 is 708975661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665798073) 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, 44772 + ... + 73048.

It is an arithmetic number, because the mean of its divisors is an integer number (96583509).

Almost surely, 2^1665798070 is an apocalyptic number.

1665798070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665798070 is a deficient number, since it is larger than the sum of its proper divisors (1424874218).

1665798070 is a wasteful number, since it uses less digits than its factorization.

1665798070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28464.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 1665798070 is about 40814.1895668651. The cubic root of 1665798070 is about 1185.4250986613.

The spelling of 1665798070 in words is "one billion, six hundred sixty-five million, seven hundred ninety-eight thousand, seventy".