66157090333465 has 4 divisors (see below), whose sum is σ = 79388508400164. Its totient is φ = 52925672266768.

The previous prime is 66157090333421. The next prime is 66157090333507. The reversal of 66157090333465 is 56433309075166.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24253684588809 + 41903405744656 = 4924803^2 + 6473284^2 .

It is a cyclic number.

It is not a de Polignac number, because 66157090333465 - 2³³ = 66148500398873 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 6615709033342 + ... + 6615709033351.

It is an arithmetic number, because the mean of its divisors is an integer number (19847127100041).

Almost surely, 2^{66157090333465} is an apocalyptic number.

It is an amenable number.

66157090333465 is a deficient number, since it is larger than the sum of its proper divisors (13231418066699).

66157090333465 is a wasteful number, since it uses less digits than its factorization.

66157090333465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13231418066698.

The product of its (nonzero) digits is 36741600, while the sum is 58.

The spelling of 66157090333465 in words is "sixty-six trillion, one hundred fifty-seven billion, ninety million, three hundred thirty-three thousand, four hundred sixty-five".