1666552207 has 2 divisors, whose sum is σ = 1666552208. Its totient is φ = 1666552206.

The previous prime is 1666552201. The next prime is 1666552213. The reversal of 1666552207 is 7022556661.

It is a balanced prime because it is at equal distance from previous prime (1666552201) and next prime (1666552213).

It is a cyclic number.

It is not a de Polignac number, because 1666552207 - 2²³ = 1658163599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1666552207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666552201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833276103 + 833276104.

It is an arithmetic number, because the mean of its divisors is an integer number (833276104).

Almost surely, 2^1666552207 is an apocalyptic number.

1666552207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666552207 is an equidigital number, since it uses as much as digits as its factorization.

1666552207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 1666552207 is about 40823.4271834201. The cubic root of 1666552207 is about 1185.6039594872.

The spelling of 1666552207 in words is "one billion, six hundred sixty-six million, five hundred fifty-two thousand, two hundred seven".