66056751403 has 8 divisors (see below), whose sum is σ = 71569011888. Its totient is φ = 60725220864.

The previous prime is 66056751401. The next prime is 66056751407. The reversal of 66056751403 is 30415765066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66056751403 - 2¹ = 66056751401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66056751403.

It is not an unprimeable number, because it can be changed into a prime (66056751401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45181726 + ... + 45183187.

It is an arithmetic number, because the mean of its divisors is an integer number (8946126486).

Almost surely, 2^66056751403 is an apocalyptic number.

66056751403 is a deficient number, since it is larger than the sum of its proper divisors (5512260485).

66056751403 is a wasteful number, since it uses less digits than its factorization.

66056751403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90364973.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 66056751403 in words is "sixty-six billion, fifty-six million, seven hundred fifty-one thousand, four hundred three".