6690754091 has 4 divisors (see below), whose sum is σ = 7646576112. Its totient is φ = 5734932072.

The previous prime is 6690754061. The next prime is 6690754099. The reversal of 6690754091 is 1904570966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6690754091 - 2¹⁴ = 6690737707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6690754099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477911000 + ... + 477911013.

It is an arithmetic number, because the mean of its divisors is an integer number (1911644028).

Almost surely, 2^6690754091 is an apocalyptic number.

6690754091 is a deficient number, since it is larger than the sum of its proper divisors (955822021).

6690754091 is an equidigital number, since it uses as much as digits as its factorization.

6690754091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955822020.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 6690754091 is about 81797.0298421648. The cubic root of 6690754091 is about 1884.3360466784.

The spelling of 6690754091 in words is "six billion, six hundred ninety million, seven hundred fifty-four thousand, ninety-one".