5671661765 has 16 divisors (see below), whose sum is σ = 8485395840. Its totient is φ = 3535581120.

The previous prime is 5671661729. The next prime is 5671661777.

5671661765 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5671661765 - 2¹⁸ = 5671399621 is a prime.

It is a super-3 number, since 3×5671661765³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7365410 + ... + 7366179.

It is an arithmetic number, because the mean of its divisors is an integer number (530337240).

Almost surely, 2^5671661765 is an apocalyptic number.

5671661765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5671661765 is a deficient number, since it is larger than the sum of its proper divisors (2813734075).

5671661765 is a wasteful number, since it uses less digits than its factorization.

5671661765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14731612.

The product of its digits is 1587600, while the sum is 50.

The square root of 5671661765 is about 75310.4359634174. The cubic root of 5671661765 is about 1783.3507734244.

The spelling of 5671661765 in words is "five billion, six hundred seventy-one million, six hundred sixty-one thousand, seven hundred sixty-five".