1666870335037 has 2 divisors, whose sum is σ = 1666870335038. Its totient is φ = 1666870335036.

The previous prime is 1666870335007. The next prime is 1666870335059. The reversal of 1666870335037 is 7305330786661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1533582547641 + 133287787396 = 1238379^2 + 365086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1666870335037 - 2²³ = 1666861946429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666870335007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833435167518 + 833435167519.

It is an arithmetic number, because the mean of its divisors is an integer number (833435167519).

Almost surely, 2^{1666870335037} is an apocalyptic number.

It is an amenable number.

1666870335037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666870335037 is an equidigital number, since it uses as much as digits as its factorization.

1666870335037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11430720, while the sum is 55.

The spelling of 1666870335037 in words is "one trillion, six hundred sixty-six billion, eight hundred seventy million, three hundred thirty-five thousand, thirty-seven".