166129493455 has 8 divisors (see below), whose sum is σ = 199373301792. Its totient is φ = 132891655008.

The previous prime is 166129493449. The next prime is 166129493479. The reversal of 166129493455 is 554394921661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166129493455 - 2³ = 166129493447 is a prime.

It is a super-2 number, since 2×166129493455² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166129493396 and 166129493405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431019 + ... + 1542748.

It is an arithmetic number, because the mean of its divisors is an integer number (24921662724).

Almost surely, 2^166129493455 is an apocalyptic number.

166129493455 is a deficient number, since it is larger than the sum of its proper divisors (33243808337).

166129493455 is a wasteful number, since it uses less digits than its factorization.

166129493455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984945.

The product of its digits is 6998400, while the sum is 55.

The spelling of 166129493455 in words is "one hundred sixty-six billion, one hundred twenty-nine million, four hundred ninety-three thousand, four hundred fifty-five".