161066667 has 32 divisors (see below), whose sum is σ = 235872000. Its totient is φ = 97372800.

The previous prime is 161066663. The next prime is 161066683. The reversal of 161066667 is 766660161.

It is not a de Polignac number, because 161066667 - 2² = 161066663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161066663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229417 + ... + 230117.

It is an arithmetic number, because the mean of its divisors is an integer number (7371000).

Almost surely, 2^161066667 is an apocalyptic number.

161066667 is a deficient number, since it is larger than the sum of its proper divisors (74805333).

161066667 is a wasteful number, since it uses less digits than its factorization.

161066667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 161066667 is about 12691.2043163760. The cubic root of 161066667 is about 544.0872605030.

The spelling of 161066667 in words is "one hundred sixty-one million, sixty-six thousand, six hundred sixty-seven".