66136430694 has 16 divisors (see below), whose sum is σ = 132277687920. Its totient is φ = 22044672480.

The previous prime is 66136430671. The next prime is 66136430749. The reversal of 66136430694 is 49603463166.

66136430694 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 8829 + ... + 363800.

It is an arithmetic number, because the mean of its divisors is an integer number (8267355495).

Almost surely, 2^66136430694 is an apocalyptic number.

66136430694 is an abundant number, since it is smaller than the sum of its proper divisors (66141257226).

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

66136430694 is a wasteful number, since it uses less digits than its factorization.

66136430694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402215.

The product of its (nonzero) digits is 1679616, while the sum is 48.

The spelling of 66136430694 in words is "sixty-six billion, one hundred thirty-six million, four hundred thirty thousand, six hundred ninety-four".