166432340261506 has 256 divisors, whose sum is σ = 306983640268800. Its totient is φ = 66832538572800.

The previous prime is 166432340261501. The next prime is 166432340261563. The reversal of 166432340261506 is 605162043234661.

It is a super-2 number, since 2×166432340261506² (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 166432340261506.

It is not an unprimeable number, because it can be changed into a prime (166432340261501) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21965462790 + ... + 21965470366.

It is an arithmetic number, because the mean of its divisors is an integer number (1199154844800).

Almost surely, 2^{166432340261506} is an apocalyptic number.

166432340261506 is a deficient number, since it is larger than the sum of its proper divisors (140551300007294).

166432340261506 is a wasteful number, since it uses less digits than its factorization.

166432340261506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8225.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 166432340261506 in words is "one hundred sixty-six trillion, four hundred thirty-two billion, three hundred forty million, two hundred sixty-one thousand, five hundred six".