66011799 has 32 divisors (see below), whose sum is σ = 107205120. Its totient is φ = 35269632.

The previous prime is 66011797. The next prime is 66011887. The reversal of 66011799 is 99711066.

It is not a de Polignac number, because 66011799 - 2¹ = 66011797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66011797) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63387 + ... + 64419.

It is an arithmetic number, because the mean of its divisors is an integer number (3350160).

Almost surely, 2^66011799 is an apocalyptic number.

66011799 is a deficient number, since it is larger than the sum of its proper divisors (41193321).

66011799 is a wasteful number, since it uses less digits than its factorization.

66011799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 66011799 is about 8124.7645504347. The cubic root of 66011799 is about 404.1480827440.

The spelling of 66011799 in words is "sixty-six million, eleven thousand, seven hundred ninety-nine".