132666691 has 16 divisors (see below), whose sum is σ = 147184128. Its totient is φ = 118940800.

The previous prime is 132666689. The next prime is 132666697. The reversal of 132666691 is 196666231.

132666691 = 115² + 116² + ... + 736².

It is a cyclic number.

It is not a de Polignac number, because 132666691 - 2¹ = 132666689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (132666697) 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, 121056 + ... + 122146.

It is an arithmetic number, because the mean of its divisors is an integer number (9199008).

Almost surely, 2^132666691 is an apocalyptic number.

132666691 is a deficient number, since it is larger than the sum of its proper divisors (14517437).

132666691 is a wasteful number, since it uses less digits than its factorization.

132666691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442.

The product of its digits is 69984, while the sum is 40.

The square root of 132666691 is about 11518.1027517556. The cubic root of 132666691 is about 510.0201081396.

The spelling of 132666691 in words is "one hundred thirty-two million, six hundred sixty-six thousand, six hundred ninety-one".