161066451 has 32 divisors (see below), whose sum is σ = 265097728. Its totient is φ = 84706560.

The previous prime is 161066441. The next prime is 161066489. The reversal of 161066451 is 154660161.

It is not a de Polignac number, because 161066451 - 2¹⁸ = 160804307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161066431) 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, 124116 + ... + 125406.

It is an arithmetic number, because the mean of its divisors is an integer number (8284304).

Almost surely, 2^161066451 is an apocalyptic number.

161066451 is a deficient number, since it is larger than the sum of its proper divisors (104031277).

161066451 is a wasteful number, since it uses less digits than its factorization.

161066451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 161066451 is about 12691.1958065424. The cubic root of 161066451 is about 544.0870172851.

The spelling of 161066451 in words is "one hundred sixty-one million, sixty-six thousand, four hundred fifty-one".