166961073 has 8 divisors (see below), whose sum is σ = 222697728. Its totient is φ = 111265904.

The previous prime is 166961051. The next prime is 166961083. The reversal of 166961073 is 370169661.

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 166961073 - 2¹⁸ = 166698929 is a prime.

It is a super-2 number, since 2×166961073² = 55751999794622658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166961083) 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, 715 + ... + 18287.

It is an arithmetic number, because the mean of its divisors is an integer number (27837216).

Almost surely, 2^166961073 is an apocalyptic number.

It is an amenable number.

166961073 is a deficient number, since it is larger than the sum of its proper divisors (55736655).

166961073 is a wasteful number, since it uses less digits than its factorization.

166961073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20743.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 166961073 is about 12921.3417646930. The cubic root of 166961073 is about 550.6450536377.

The spelling of 166961073 in words is "one hundred sixty-six million, nine hundred sixty-one thousand, seventy-three".