31466630166661 has 2 divisors, whose sum is σ = 31466630166662. Its totient is φ = 31466630166660.

The previous prime is 31466630166617. The next prime is 31466630166667. The reversal of 31466630166661 is 16666103666413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31308221390625 + 158408776036 = 5595375^2 + 398006^2 .

It is an emirp because it is prime and its reverse (16666103666413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31466630166661 - 2¹⁹ = 31466629642373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31466630166667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15733315083330 + 15733315083331.

It is an arithmetic number, because the mean of its divisors is an integer number (15733315083331).

Almost surely, 2^{31466630166661} is an apocalyptic number.

It is an amenable number.

31466630166661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31466630166661 is an equidigital number, since it uses as much as digits as its factorization.

31466630166661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 55.

The spelling of 31466630166661 in words is "thirty-one trillion, four hundred sixty-six billion, six hundred thirty million, one hundred sixty-six thousand, six hundred sixty-one".