2665371545 has 4 divisors (see below), whose sum is σ = 3198445860. Its totient is φ = 2132297232.

The previous prime is 2665371539. The next prime is 2665371557. The reversal of 2665371545 is 5451735662.

It is a happy number.

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 1794708496 + 870663049 = 42364^2 + 29507^2 .

It is a cyclic number.

It is not a de Polignac number, because 2665371545 - 2⁶ = 2665371481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2665371496 and 2665371505.

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, 266537150 + ... + 266537159.

It is an arithmetic number, because the mean of its divisors is an integer number (799611465).

Almost surely, 2^2665371545 is an apocalyptic number.

It is an amenable number.

2665371545 is a deficient number, since it is larger than the sum of its proper divisors (533074315).

2665371545 is an equidigital number, since it uses as much as digits as its factorization.

2665371545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533074314.

The product of its digits is 756000, while the sum is 44.

The square root of 2665371545 is about 51627.2364648738. The cubic root of 2665371545 is about 1386.4980155453.

The spelling of 2665371545 in words is "two billion, six hundred sixty-five million, three hundred seventy-one thousand, five hundred forty-five".