91416661 has 8 divisors (see below), whose sum is σ = 105401664. Its totient is φ = 77663040.

The previous prime is 91416649. The next prime is 91416673. The reversal of 91416661 is 16661419.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91416649) and next prime (91416673).

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

It is not a de Polignac number, because 91416661 - 2⁵ = 91416629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91416631) 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, 56995 + ... + 58576.

It is an arithmetic number, because the mean of its divisors is an integer number (13175208).

Almost surely, 2^91416661 is an apocalyptic number.

It is an amenable number.

91416661 is a deficient number, since it is larger than the sum of its proper divisors (13985003).

91416661 is a wasteful number, since it uses less digits than its factorization.

91416661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115691.

The product of its digits is 7776, while the sum is 34.

The square root of 91416661 is about 9561.2060431726. The cubic root of 91416661 is about 450.4795891061.

The spelling of 91416661 in words is "ninety-one million, four hundred sixteen thousand, six hundred sixty-one".