151166661601 has 2 divisors, whose sum is σ = 151166661602. Its totient is φ = 151166661600.

The previous prime is 151166661589. The next prime is 151166661643. The reversal of 151166661601 is 106166661151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124930437025 + 26236224576 = 353455^2 + 161976^2 .

It is a cyclic number.

It is not a de Polignac number, because 151166661601 - 2⁷ = 151166661473 is a prime.

It is not a weakly prime, because it can be changed into another prime (151166661901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75583330800 + 75583330801.

It is an arithmetic number, because the mean of its divisors is an integer number (75583330801).

Almost surely, 2^151166661601 is an apocalyptic number.

It is an amenable number.

151166661601 is a deficient number, since it is larger than the sum of its proper divisors (1).

151166661601 is an equidigital number, since it uses as much as digits as its factorization.

151166661601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 151166661601 in words is "one hundred fifty-one billion, one hundred sixty-six million, six hundred sixty-one thousand, six hundred one".