166619076100 has 27 divisors (see below), whose sum is σ = 361572253077. Its totient is φ = 66645997680.

The previous prime is 166619076079. The next prime is 166619076103. The reversal of 166619076100 is 1670916661.

The square root of 166619076100 is 408190.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 59982867396 + 106636208704 = 244914^2 + 326552^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166619076103) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4061491 + ... + 4102309.

Almost surely, 2^166619076100 is an apocalyptic number.

166619076100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166619076100 is the 408190-th square number.

It is an amenable number.

166619076100 is an abundant number, since it is smaller than the sum of its proper divisors (194953176977).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166619076100 is an frugal number, since it uses more digits than its factorization.

166619076100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81652 (or 40826 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 166619076100 in words is "one hundred sixty-six billion, six hundred nineteen million, seventy-six thousand, one hundred".