7641244066 has 4 divisors (see below), whose sum is σ = 11461866102. Its totient is φ = 3820622032.

The previous prime is 7641244063. The next prime is 7641244139. The reversal of 7641244066 is 6604421467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6604421467 = 7 ⋅943488781.

It can be written as a sum of positive squares in only one way, i.e., 7507356025 + 133888041 = 86645^2 + 11571^2 .

It is a super-2 number, since 2×7641244066² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7641244063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910311015 + ... + 1910311018.

Almost surely, 2^7641244066 is an apocalyptic number.

7641244066 is a deficient number, since it is larger than the sum of its proper divisors (3820622036).

7641244066 is a wasteful number, since it uses less digits than its factorization.

7641244066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820622035.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 7641244066 is about 87414.2097487588. The cubic root of 7641244066 is about 1969.6452989849.

The spelling of 7641244066 in words is "seven billion, six hundred forty-one million, two hundred forty-four thousand, sixty-six".