7664987 has 6 divisors (see below), whose sum is σ = 8425284. Its totient is φ = 6968060.

The previous prime is 7664983. The next prime is 7665017. The reversal of 7664987 is 7894667.

It is a happy number.

It is not a de Polignac number, because 7664987 - 2² = 7664983 is a prime.

It is a super-3 number, since 3×7664987³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7664983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31553 + ... + 31794.

It is an arithmetic number, because the mean of its divisors is an integer number (1404214).

Almost surely, 2^7664987 is an apocalyptic number.

7664987 is a deficient number, since it is larger than the sum of its proper divisors (760297).

7664987 is a wasteful number, since it uses less digits than its factorization.

7664987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63369 (or 63358 counting only the distinct ones).

The product of its digits is 508032, while the sum is 47.

The square root of 7664987 is about 2768.5712922011. The cubic root of 7664987 is about 197.1683222174.

The spelling of 7664987 in words is "seven million, six hundred sixty-four thousand, nine hundred eighty-seven".