7490640866 has 4 divisors (see below), whose sum is σ = 11235961302. Its totient is φ = 3745320432.

The previous prime is 7490640853. The next prime is 7490640901. The reversal of 7490640866 is 6680460947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6680460947 = 17 ⋅392968291.

It can be written as a sum of positive squares in only one way, i.e., 5445702025 + 2044938841 = 73795^2 + 45221^2 .

It is a super-2 number, since 2×7490640866² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1872660215 + ... + 1872660218.

Almost surely, 2^7490640866 is an apocalyptic number.

7490640866 is a deficient number, since it is larger than the sum of its proper divisors (3745320436).

7490640866 is a wasteful number, since it uses less digits than its factorization.

7490640866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745320435.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 7490640866 is about 86548.4885252192. The cubic root of 7490640866 is about 1956.6192645365.

The spelling of 7490640866 in words is "seven billion, four hundred ninety million, six hundred forty thousand, eight hundred sixty-six".