661483953231067 has 2 divisors, whose sum is σ = 661483953231068. Its totient is φ = 661483953231066.

The previous prime is 661483953231001. The next prime is 661483953231181. The reversal of 661483953231067 is 760132359384166.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 661483953231067 - 2²³ = 661483944842459 is a prime.

It is a super-2 number, since 2×661483953231067² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (661483953231767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330741976615533 + 330741976615534.

It is an arithmetic number, because the mean of its divisors is an integer number (330741976615534).

It is a 1-persistent number, because it is pandigital, but 2⋅661483953231067 = 1322967906462134 is not.

Almost surely, 2^{661483953231067} is an apocalyptic number.

661483953231067 is a deficient number, since it is larger than the sum of its proper divisors (1).

661483953231067 is an equidigital number, since it uses as much as digits as its factorization.

661483953231067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117573120, while the sum is 64.

The spelling of 661483953231067 in words is "six hundred sixty-one trillion, four hundred eighty-three billion, nine hundred fifty-three million, two hundred thirty-one thousand, sixty-seven".