161407667 has 4 divisors (see below), whose sum is σ = 161552520. Its totient is φ = 161262816.

The previous prime is 161407663. The next prime is 161407699. The reversal of 161407667 is 766704161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161407667 - 2² = 161407663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161407667.

It is not an unprimeable number, because it can be changed into a prime (161407663) 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, 70742 + ... + 72987.

It is an arithmetic number, because the mean of its divisors is an integer number (40388130).

Almost surely, 2^161407667 is an apocalyptic number.

161407667 is a deficient number, since it is larger than the sum of its proper divisors (144853).

161407667 is a wasteful number, since it uses less digits than its factorization.

161407667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144852.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 161407667 is about 12704.6317144575. The cubic root of 161407667 is about 544.4709587146.

The spelling of 161407667 in words is "one hundred sixty-one million, four hundred seven thousand, six hundred sixty-seven".