166988033517 has 16 divisors (see below), whose sum is σ = 235756059840. Its totient is φ = 104773139712.

The previous prime is 166988033461. The next prime is 166988033521. The reversal of 166988033517 is 715330889661.

It is not a de Polignac number, because 166988033517 - 2⁶ = 166988033453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166988033117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2763534 + ... + 2823312.

It is an arithmetic number, because the mean of its divisors is an integer number (14734753740).

Almost surely, 2^166988033517 is an apocalyptic number.

166988033517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

166988033517 is a deficient number, since it is larger than the sum of its proper divisors (68768026323).

166988033517 is a wasteful number, since it uses less digits than its factorization.

166988033517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114572.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 166988033517 in words is "one hundred sixty-six billion, nine hundred eighty-eight million, thirty-three thousand, five hundred seventeen".