866628499 has 24 divisors (see below), whose sum is σ = 1021567680. Its totient is φ = 731976960.

The previous prime is 866628487. The next prime is 866628559. The reversal of 866628499 is 994826668.

It is not a de Polignac number, because 866628499 - 2⁹ = 866627987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866628409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159837 + ... + 165169.

It is an arithmetic number, because the mean of its divisors is an integer number (42565320).

Almost surely, 2^866628499 is an apocalyptic number.

866628499 is a deficient number, since it is larger than the sum of its proper divisors (154939181).

866628499 is a wasteful number, since it uses less digits than its factorization.

866628499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5451 (or 5440 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 58.

The square root of 866628499 is about 29438.5546350360. The cubic root of 866628499 is about 953.4055057129.

The spelling of 866628499 in words is "eight hundred sixty-six million, six hundred twenty-eight thousand, four hundred ninety-nine".