67406091 has 16 divisors (see below), whose sum is σ = 96915840. Its totient is φ = 41532480.

The previous prime is 67406081. The next prime is 67406117. The reversal of 67406091 is 19060476.

It is a happy number.

It is not a de Polignac number, because 67406091 - 2⁹ = 67405579 is a prime.

It is a super-2 number, since 2×67406091² = 9087162207800562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67406021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12085 + ... + 16758.

It is an arithmetic number, because the mean of its divisors is an integer number (6057240).

Almost surely, 2^67406091 is an apocalyptic number.

67406091 is a deficient number, since it is larger than the sum of its proper divisors (29509749).

67406091 is a wasteful number, since it uses less digits than its factorization.

67406091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28906.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 67406091 is about 8210.1212536722. The cubic root of 67406091 is about 406.9737339347.

The spelling of 67406091 in words is "sixty-seven million, four hundred six thousand, ninety-one".