7506678997 has 2 divisors, whose sum is σ = 7506678998. Its totient is φ = 7506678996.

The previous prime is 7506678937. The next prime is 7506679021. The reversal of 7506678997 is 7998766057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7258017636 + 248661361 = 85194^2 + 15769^2 .

It is an emirp because it is prime and its reverse (7998766057) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7506678997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7506678917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3753339498 + 3753339499.

It is an arithmetic number, because the mean of its divisors is an integer number (3753339499).

Almost surely, 2^7506678997 is an apocalyptic number.

It is an amenable number.

7506678997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7506678997 is an equidigital number, since it uses as much as digits as its factorization.

7506678997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40007520, while the sum is 64.

The square root of 7506678997 is about 86641.0930044168. The cubic root of 7506678997 is about 1958.0147012814.

The spelling of 7506678997 in words is "seven billion, five hundred six million, six hundred seventy-eight thousand, nine hundred ninety-seven".