7664340378 has 16 divisors (see below), whose sum is σ = 15396210720. Its totient is φ = 2543525136.

The previous prime is 7664340361. The next prime is 7664340379. The reversal of 7664340378 is 8730434667.

It is a super-2 number, since 2×7664340378² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7664340379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2812273 + ... + 2814996.

It is an arithmetic number, because the mean of its divisors is an integer number (962263170).

Almost surely, 2^7664340378 is an apocalyptic number.

7664340378 is an abundant number, since it is smaller than the sum of its proper divisors (7731870342).

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

7664340378 is a wasteful number, since it uses less digits than its factorization.

7664340378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5627501.

The product of its (nonzero) digits is 2032128, while the sum is 48.

The square root of 7664340378 is about 87546.2185248455. The cubic root of 7664340378 is about 1971.6277765653.

The spelling of 7664340378 in words is "seven billion, six hundred sixty-four million, three hundred forty thousand, three hundred seventy-eight".