1665336720367 has 8 divisors (see below), whose sum is σ = 1772158500000. Its totient is φ = 1559499473664.

The previous prime is 1665336720329. The next prime is 1665336720373. The reversal of 1665336720367 is 7630276335661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1665336720367 is a prime.

It is a super-2 number, since 2×1665336720367² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665336727367) 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, 246129742 + ... + 246136507.

It is an arithmetic number, because the mean of its divisors is an integer number (221519812500).

Almost surely, 2^{1665336720367} is an apocalyptic number.

1665336720367 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1665336720367 is a deficient number, since it is larger than the sum of its proper divisors (106821779633).

1665336720367 is a wasteful number, since it uses less digits than its factorization.

1665336720367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492266465.

The product of its (nonzero) digits is 17146080, while the sum is 55.

The spelling of 1665336720367 in words is "one trillion, six hundred sixty-five billion, three hundred thirty-six million, seven hundred twenty thousand, three hundred sixty-seven".