166740497 has 8 divisors (see below), whose sum is σ = 207884352. Its totient is φ = 129927600.

The previous prime is 166740479. The next prime is 166740499. The reversal of 166740497 is 794047661.

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

It is not a de Polignac number, because 166740497 - 2²⁶ = 99631633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166740499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082654 + ... + 1082807.

It is an arithmetic number, because the mean of its divisors is an integer number (25985544).

Almost surely, 2^166740497 is an apocalyptic number.

It is an amenable number.

166740497 is a deficient number, since it is larger than the sum of its proper divisors (41143855).

166740497 is a wasteful number, since it uses less digits than its factorization.

166740497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165479.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 166740497 is about 12912.8036072729. The cubic root of 166740497 is about 550.4024569495.

The spelling of 166740497 in words is "one hundred sixty-six million, seven hundred forty thousand, four hundred ninety-seven".