167044661 has 4 divisors (see below), whose sum is σ = 190908192. Its totient is φ = 143181132.

The previous prime is 167044651. The next prime is 167044673. The reversal of 167044661 is 166440761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166440761 = 17 ⋅9790633.

It is a cyclic number.

It is not a de Polignac number, because 167044661 - 2⁶ = 167044597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167044621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11931755 + ... + 11931768.

It is an arithmetic number, because the mean of its divisors is an integer number (47727048).

Almost surely, 2^167044661 is an apocalyptic number.

It is an amenable number.

167044661 is a deficient number, since it is larger than the sum of its proper divisors (23863531).

167044661 is an equidigital number, since it uses as much as digits as its factorization.

167044661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23863530.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 167044661 is about 12924.5758537756. The cubic root of 167044661 is about 550.7369306222.

The spelling of 167044661 in words is "one hundred sixty-seven million, forty-four thousand, six hundred sixty-one".