66498420079 has 32 divisors (see below), whose sum is σ = 82329375744. Its totient is φ = 52302862080.

The previous prime is 66498420059. The next prime is 66498420113. The reversal of 66498420079 is 97002489466.

It is a happy number.

It is not a de Polignac number, because 66498420079 - 2⁹ = 66498419567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66498420059) 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, 22905342 + ... + 22908244.

It is an arithmetic number, because the mean of its divisors is an integer number (2572792992).

Almost surely, 2^66498420079 is an apocalyptic number.

66498420079 is a deficient number, since it is larger than the sum of its proper divisors (15830955665).

66498420079 is a wasteful number, since it uses less digits than its factorization.

66498420079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4327.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 66498420079 in words is "sixty-six billion, four hundred ninety-eight million, four hundred twenty thousand, seventy-nine".