66375695420 has 24 divisors (see below), whose sum is σ = 140194684224. Its totient is φ = 26396806976.

The previous prime is 66375695387. The next prime is 66375695437. The reversal of 66375695420 is 2459657366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9588404 + ... + 9595323.

It is an arithmetic number, because the mean of its divisors is an integer number (5841445176).

Almost surely, 2^66375695420 is an apocalyptic number.

It is an amenable number.

66375695420 is an abundant number, since it is smaller than the sum of its proper divisors (73818988804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66375695420 is a wasteful number, since it uses less digits than its factorization.

66375695420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19183909 (or 19183907 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 53.

The spelling of 66375695420 in words is "sixty-six billion, three hundred seventy-five million, six hundred ninety-five thousand, four hundred twenty".