66740370340407 has 16 divisors (see below), whose sum is σ = 94224632947200. Its totient is φ = 41875006960512.

The previous prime is 66740370340379. The next prime is 66740370340477. The reversal of 66740370340407 is 70404307304766.

It is not a de Polignac number, because 66740370340407 - 2¹¹ = 66740370338359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 66740370340407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66740370340477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18717157 + ... + 21995742.

It is an arithmetic number, because the mean of its divisors is an integer number (5889039559200).

Almost surely, 2^{66740370340407} is an apocalyptic number.

66740370340407 is a deficient number, since it is larger than the sum of its proper divisors (27484262606793).

66740370340407 is a wasteful number, since it uses less digits than its factorization.

66740370340407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40745062.

The product of its (nonzero) digits is 7112448, while the sum is 51.

The spelling of 66740370340407 in words is "sixty-six trillion, seven hundred forty billion, three hundred seventy million, three hundred forty thousand, four hundred seven".