423161661 has 8 divisors (see below), whose sum is σ = 607616800. Its totient is φ = 260407152.

The previous prime is 423161657. The next prime is 423161677. The reversal of 423161661 is 166161324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 423161661 - 2² = 423161657 is a prime.

It is a super-3 number, since 3×423161661³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423161611) 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, 5425111 + ... + 5425188.

It is an arithmetic number, because the mean of its divisors is an integer number (75952100).

Almost surely, 2^423161661 is an apocalyptic number.

It is an amenable number.

423161661 is a deficient number, since it is larger than the sum of its proper divisors (184455139).

423161661 is a wasteful number, since it uses less digits than its factorization.

423161661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10850315.

The product of its digits is 5184, while the sum is 30.

The square root of 423161661 is about 20570.8935391733. The cubic root of 423161661 is about 750.7616919497.

The spelling of 423161661 in words is "four hundred twenty-three million, one hundred sixty-one thousand, six hundred sixty-one".