7775020690 has 8 divisors (see below), whose sum is σ = 13995037260. Its totient is φ = 3110008272.

The previous prime is 7775020667. The next prime is 7775020697. The reversal of 7775020690 is 960205777.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7228910529 + 546110161 = 85023^2 + 23369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7775020690² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7775020697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388751025 + ... + 388751044.

Almost surely, 2^7775020690 is an apocalyptic number.

7775020690 is a deficient number, since it is larger than the sum of its proper divisors (6220016570).

7775020690 is a wasteful number, since it uses less digits than its factorization.

7775020690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777502076.

The product of its (nonzero) digits is 185220, while the sum is 43.

The square root of 7775020690 is about 88176.0777648904. The cubic root of 7775020690 is about 1981.0731768540.

The spelling of 7775020690 in words is "seven billion, seven hundred seventy-five million, twenty thousand, six hundred ninety".