66950099 has 4 divisors (see below), whose sum is σ = 66986400. Its totient is φ = 66913800.

The previous prime is 66950017. The next prime is 66950113. The reversal of 66950099 is 99005966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99005966 = 2 ⋅49502983.

It is a cyclic number.

It is not a de Polignac number, because 66950099 - 2¹² = 66946003 is a prime.

It is a super-2 number, since 2×66950099² = 8964631512219602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66920099) 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, 15227 + ... + 19124.

It is an arithmetic number, because the mean of its divisors is an integer number (16746600).

Almost surely, 2^66950099 is an apocalyptic number.

66950099 is a deficient number, since it is larger than the sum of its proper divisors (36301).

66950099 is a wasteful number, since it uses less digits than its factorization.

66950099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36300.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 66950099 is about 8182.3040153737. The cubic root of 66950099 is about 406.0539515125.

The spelling of 66950099 in words is "sixty-six million, nine hundred fifty thousand, ninety-nine".