166977277485 has 16 divisors (see below), whose sum is σ = 267240919680. Its totient is φ = 89028789440.

The previous prime is 166977277483. The next prime is 166977277487. The reversal of 166977277485 is 584772779661.

166977277485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166977277483) and next prime (166977277487).

It is not a de Polignac number, because 166977277485 - 2¹ = 166977277483 is a prime.

It is a super-2 number, since 2×166977277485² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166977277483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1556265 + ... + 1660094.

It is an arithmetic number, because the mean of its divisors is an integer number (16702557480).

Almost surely, 2^166977277485 is an apocalyptic number.

166977277485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166977277485 is a deficient number, since it is larger than the sum of its proper divisors (100263642195).

166977277485 is a wasteful number, since it uses less digits than its factorization.

166977277485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219828.

The product of its digits is 248935680, while the sum is 69.

The spelling of 166977277485 in words is "one hundred sixty-six billion, nine hundred seventy-seven million, two hundred seventy-seven thousand, four hundred eighty-five".