61330166987 has 2 divisors, whose sum is σ = 61330166988. Its totient is φ = 61330166986.

The previous prime is 61330166951. The next prime is 61330167043. The reversal of 61330166987 is 78966103316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61330166987 - 2⁸ = 61330166731 is a prime.

It is a super-2 number, since 2×61330166987² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61330160987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30665083493 + 30665083494.

It is an arithmetic number, because the mean of its divisors is an integer number (30665083494).

Almost surely, 2^61330166987 is an apocalyptic number.

61330166987 is a deficient number, since it is larger than the sum of its proper divisors (1).

61330166987 is an equidigital number, since it uses as much as digits as its factorization.

61330166987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 50.

The spelling of 61330166987 in words is "sixty-one billion, three hundred thirty million, one hundred sixty-six thousand, nine hundred eighty-seven".