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7664 = 24479
BaseRepresentation
bin1110111110000
3101111212
41313300
5221124
655252
731226
oct16760
911455
107664
115838
124528
133647
142b16
15240e
hex1df0

7664 has 10 divisors (see below), whose sum is σ = 14880. Its totient is φ = 3824.

The previous prime is 7649. The next prime is 7669. The reversal of 7664 is 4667.

It is a plaindrome in base 9.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7669) by changing a digit.

7664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224 + ... + 255.

It is an arithmetic number, because the mean of its divisors is an integer number (1488).

27664 is an apocalyptic number.

It is an amenable number.

7664 is a deficient number, since it is larger than the sum of its proper divisors (7216).

7664 is a wasteful number, since it uses less digits than its factorization.

7664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 481 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 7664 is about 87.5442745130. The cubic root of 7664 is about 19.7159858907.

The spelling of 7664 in words is "seven thousand, six hundred sixty-four".

Divisors: 1 2 4 8 16 479 958 1916 3832 7664