1866733901701 has 2 divisors, whose sum is σ = 1866733901702. Its totient is φ = 1866733901700.

The previous prime is 1866733901687. The next prime is 1866733901723. The reversal of 1866733901701 is 1071093376681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1423723853601 + 443010048100 = 1193199^2 + 665590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1866733901701 - 2³¹ = 1864586418053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1866733901731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933366950850 + 933366950851.

It is an arithmetic number, because the mean of its divisors is an integer number (933366950851).

Almost surely, 2^{1866733901701} is an apocalyptic number.

It is an amenable number.

1866733901701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1866733901701 is an equidigital number, since it uses as much as digits as its factorization.

1866733901701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 1866733901701 in words is "one trillion, eight hundred sixty-six billion, seven hundred thirty-three million, nine hundred one thousand, seven hundred one".