66246630819 has 16 divisors (see below), whose sum is σ = 89218272000. Its totient is φ = 43720011936.

The previous prime is 66246630811. The next prime is 66246630833. The reversal of 66246630819 is 91803664266.

It is a happy number.

It is not a de Polignac number, because 66246630819 - 2³ = 66246630811 is a prime.

It is a super-2 number, since 2×66246630819² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66246630811) 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, 862032 + ... + 935730.

It is an arithmetic number, because the mean of its divisors is an integer number (5576142000).

Almost surely, 2^66246630819 is an apocalyptic number.

66246630819 is a deficient number, since it is larger than the sum of its proper divisors (22971641181).

66246630819 is a wasteful number, since it uses less digits than its factorization.

66246630819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76714.

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 66246630819 in words is "sixty-six billion, two hundred forty-six million, six hundred thirty thousand, eight hundred nineteen".