66435601413123 has 6 divisors (see below), whose sum is σ = 95962535374524. Its totient is φ = 44290400942076.

The previous prime is 66435601413101. The next prime is 66435601413169. The reversal of 66435601413123 is 32131410653466.

66435601413123 is a `hidden beast` number, since 6 + 6 + 4 + 3 + 5 + 601 + 4 + 1 + 31 + 2 + 3 = 666.

It is not a de Polignac number, because 66435601413123 - 2¹⁶ = 66435601347587 is a prime.

It is a super-2 number, since 2×66435601413123² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66435601413173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3690866745165 + ... + 3690866745182.

It is an arithmetic number, because the mean of its divisors is an integer number (15993755895754).

Almost surely, 2^{66435601413123} is an apocalyptic number.

66435601413123 is a deficient number, since it is larger than the sum of its proper divisors (29526933961401).

66435601413123 is a wasteful number, since it uses less digits than its factorization.

66435601413123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381733490353 (or 7381733490350 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 66435601413123 in words is "sixty-six trillion, four hundred thirty-five billion, six hundred one million, four hundred thirteen thousand, one hundred twenty-three".