1040667691 has 8 divisors (see below), whose sum is σ = 1192022784. Its totient is φ = 889984680.

The previous prime is 1040667659. The next prime is 1040667707. The reversal of 1040667691 is 1967660401.

1040667691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 1040667691 - 2⁵ = 1040667659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040667491) 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, 164695 + ... + 170896.

It is an arithmetic number, because the mean of its divisors is an integer number (149002848).

Almost surely, 2^1040667691 is an apocalyptic number.

1040667691 is a deficient number, since it is larger than the sum of its proper divisors (151355093).

1040667691 is an equidigital number, since it uses as much as digits as its factorization.

1040667691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336041.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1040667691 is about 32259.3814416830. The cubic root of 1040667691 is about 1013.3761771210.

The spelling of 1040667691 in words is "one billion, forty million, six hundred sixty-seven thousand, six hundred ninety-one".