91016666 has 12 divisors (see below), whose sum is σ = 147105546. Its totient is φ = 41985240.

The previous prime is 91016663. The next prime is 91016683. The reversal of 91016666 is 66661019.

It can be written as a sum of positive squares in only one way, i.e., 87516025 + 3500641 = 9355^2 + 1871^2 .

It is not an unprimeable number, because it can be changed into a prime (91016663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47711 + ... + 49581.

Almost surely, 2^91016666 is an apocalyptic number.

91016666 is a deficient number, since it is larger than the sum of its proper divisors (56088880).

91016666 is an equidigital number, since it uses as much as digits as its factorization.

91016666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3757 (or 1886 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 91016666 is about 9540.2655099321. The cubic root of 91016666 is about 449.8216017130.

It can be divided in two parts, 910 and 16666, that added together give a cube (17576 = 26³).

The spelling of 91016666 in words is "ninety-one million, sixteen thousand, six hundred sixty-six".