67161901 has 4 divisors (see below), whose sum is σ = 67313952. Its totient is φ = 67009852.

The previous prime is 67161893. The next prime is 67161923. The reversal of 67161901 is 10916176.

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.

It is a cyclic number.

It is not a de Polignac number, because 67161901 - 2³ = 67161893 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67161301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75361 + ... + 76246.

It is an arithmetic number, because the mean of its divisors is an integer number (16828488).

Almost surely, 2^67161901 is an apocalyptic number.

It is an amenable number.

67161901 is a deficient number, since it is larger than the sum of its proper divisors (152051).

67161901 is a wasteful number, since it uses less digits than its factorization.

67161901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152050.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 67161901 is about 8195.2364822499. The cubic root of 67161901 is about 406.4816954933.

The spelling of 67161901 in words is "sixty-seven million, one hundred sixty-one thousand, nine hundred one".