66367351415 has 4 divisors (see below), whose sum is σ = 79640821704. Its totient is φ = 53093881128.

The previous prime is 66367351409. The next prime is 66367351439. The reversal of 66367351415 is 51415376366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66367351415 - 2⁸ = 66367351159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66367351415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6636735137 + ... + 6636735146.

It is an arithmetic number, because the mean of its divisors is an integer number (19910205426).

Almost surely, 2^66367351415 is an apocalyptic number.

66367351415 is a deficient number, since it is larger than the sum of its proper divisors (13273470289).

66367351415 is a wasteful number, since it uses less digits than its factorization.

66367351415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13273470288.

The product of its digits is 1360800, while the sum is 47.

The spelling of 66367351415 in words is "sixty-six billion, three hundred sixty-seven million, three hundred fifty-one thousand, four hundred fifteen".