66429937954 has 16 divisors (see below), whose sum is σ = 101974732992. Its totient is φ = 32438549808.

The previous prime is 66429937907. The next prime is 66429937957. The reversal of 66429937954 is 45973992466.

66429937954 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66429937954² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66429937957) 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, 732267 + ... + 817969.

It is an arithmetic number, because the mean of its divisors is an integer number (6373420812).

Almost surely, 2^66429937954 is an apocalyptic number.

66429937954 is a deficient number, since it is larger than the sum of its proper divisors (35544795038).

66429937954 is a wasteful number, since it uses less digits than its factorization.

66429937954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94761.

The product of its digits is 88179840, while the sum is 64.

The spelling of 66429937954 in words is "sixty-six billion, four hundred twenty-nine million, nine hundred thirty-seven thousand, nine hundred fifty-four".