66309476514 has 32 divisors (see below), whose sum is σ = 146525293440. Its totient is φ = 19898495232.

The previous prime is 66309476503. The next prime is 66309476543. The reversal of 66309476514 is 41567490366.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14130109 + ... + 14134800.

It is an arithmetic number, because the mean of its divisors is an integer number (4578915420).

Almost surely, 2^66309476514 is an apocalyptic number.

66309476514 is an abundant number, since it is smaller than the sum of its proper divisors (80215816926).

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

66309476514 is a wasteful number, since it uses less digits than its factorization.

66309476514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28264954.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 66309476514 in words is "sixty-six billion, three hundred nine million, four hundred seventy-six thousand, five hundred fourteen".