66211013635 has 32 divisors (see below), whose sum is σ = 88548812352. Its totient is φ = 47209443840.

The previous prime is 66211013581. The next prime is 66211013641. The reversal of 66211013635 is 53631011266.

It is not a de Polignac number, because 66211013635 - 2⁷ = 66211013507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66211013635.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209977 + ... + 420133.

It is an arithmetic number, because the mean of its divisors is an integer number (2767150386).

Almost surely, 2^66211013635 is an apocalyptic number.

66211013635 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66211013635 is a deficient number, since it is larger than the sum of its proper divisors (22337798717).

66211013635 is a wasteful number, since it uses less digits than its factorization.

66211013635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210343.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 66211013635 in words is "sixty-six billion, two hundred eleven million, thirteen thousand, six hundred thirty-five".