166723016151261 has 32 divisors (see below), whose sum is σ = 236040012472320. Its totient is φ = 104525206545600.

The previous prime is 166723016151203. The next prime is 166723016151283. The reversal of 166723016151261 is 162151610327661.

166723016151261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166723016151261 - 2¹⁰ = 166723016150237 is a prime.

It is a super-2 number, since 2×166723016151261² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166723016151261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166723016151061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176570481 + ... + 177512198.

It is an arithmetic number, because the mean of its divisors is an integer number (7376250389760).

Almost surely, 2^{166723016151261} is an apocalyptic number.

It is an amenable number.

166723016151261 is a deficient number, since it is larger than the sum of its proper divisors (69316996321059).

166723016151261 is a wasteful number, since it uses less digits than its factorization.

166723016151261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354082857.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 166723016151261 in words is "one hundred sixty-six trillion, seven hundred twenty-three billion, sixteen million, one hundred fifty-one thousand, two hundred sixty-one".