1666713296 has 20 divisors (see below), whose sum is σ = 3243365700. Its totient is φ = 829715712.

The previous prime is 1666713287. The next prime is 1666713299. The reversal of 1666713296 is 6923176661.

It can be written as a sum of positive squares in 2 ways, for example, as 1538208400 + 128504896 = 39220^2 + 11336^2 .

It is a super-2 number, since 2×1666713296² = 5555866422126367232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1666713296.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666713299) 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, 223781 + ... + 231108.

It is an arithmetic number, because the mean of its divisors is an integer number (162168285).

Almost surely, 2^1666713296 is an apocalyptic number.

1666713296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1666713296 is a deficient number, since it is larger than the sum of its proper divisors (1576652404).

1666713296 is a wasteful number, since it uses less digits than its factorization.

1666713296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455126 (or 455120 counting only the distinct ones).

The product of its digits is 489888, while the sum is 47.

The square root of 1666713296 is about 40825.4001327605. The cubic root of 1666713296 is about 1185.6421584311.

The spelling of 1666713296 in words is "one billion, six hundred sixty-six million, seven hundred thirteen thousand, two hundred ninety-six".