7664134785 has 16 divisors (see below), whose sum is σ = 12908016960. Its totient is φ = 3872404800.

The previous prime is 7664134771. The next prime is 7664134787. The reversal of 7664134785 is 5874314667.

It is a happy number.

It is not a de Polignac number, because 7664134785 - 2⁷ = 7664134657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7664134787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13445566 + ... + 13446135.

It is an arithmetic number, because the mean of its divisors is an integer number (806751060).

Almost surely, 2^7664134785 is an apocalyptic number.

It is an amenable number.

7664134785 is a deficient number, since it is larger than the sum of its proper divisors (5243882175).

7664134785 is a wasteful number, since it uses less digits than its factorization.

7664134785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26891728.

The product of its digits is 3386880, while the sum is 51.

The square root of 7664134785 is about 87545.0443200527. The cubic root of 7664134785 is about 1971.6101470206.

The spelling of 7664134785 in words is "seven billion, six hundred sixty-four million, one hundred thirty-four thousand, seven hundred eighty-five".