16661707 has 2 divisors, whose sum is σ = 16661708. Its totient is φ = 16661706.

The previous prime is 16661681. The next prime is 16661713. The reversal of 16661707 is 70716661.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (70716661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16661707 is a prime.

It is a super-2 number, since 2×16661707² = 555224960307698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16661767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330853 + 8330854.

It is an arithmetic number, because the mean of its divisors is an integer number (8330854).

Almost surely, 2^16661707 is an apocalyptic number.

16661707 is a deficient number, since it is larger than the sum of its proper divisors (1).

16661707 is an equidigital number, since it uses as much as digits as its factorization.

16661707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 16661707 is about 4081.8754268106. The cubic root of 16661707 is about 255.4111373551.

The spelling of 16661707 in words is "sixteen million, six hundred sixty-one thousand, seven hundred seven".