56667765 has 96 divisors (see below), whose sum is σ = 118457856. Its totient is φ = 22861440.

The previous prime is 56667763. The next prime is 56667773. The reversal of 56667765 is 56776665.

It is not a de Polignac number, because 56667765 - 2¹ = 56667763 is a prime.

It is a super-2 number, since 2×56667765² = 6422471180190450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56667763) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 347574 + ... + 347736.

It is an arithmetic number, because the mean of its divisors is an integer number (1233936).

Almost surely, 2^56667765 is an apocalyptic number.

56667765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56667765 is an abundant number, since it is smaller than the sum of its proper divisors (61790091).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56667765 is a wasteful number, since it uses less digits than its factorization.

56667765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 232 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 48.

The square root of 56667765 is about 7527.7994792635. The cubic root of 56667765 is about 384.1009323982.

Subtracting 56667765 from its reverse (56776665), we obtain a square (108900 = 330²).

It can be divided in two parts, 5666 and 7765, that added together give a palindrome (13431).

The spelling of 56667765 in words is "fifty-six million, six hundred sixty-seven thousand, seven hundred sixty-five".