7249511866 has 8 divisors (see below), whose sum is σ = 10874646900. Its totient is φ = 3624629568.

The previous prime is 7249511837. The next prime is 7249511903. The reversal of 7249511866 is 6681159427.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6770821225 + 478690641 = 82285^2 + 21879^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46860 + ... + 129208.

Almost surely, 2^7249511866 is an apocalyptic number.

7249511866 is a deficient number, since it is larger than the sum of its proper divisors (3625135034).

7249511866 is a wasteful number, since it uses less digits than its factorization.

7249511866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126368.

The product of its digits is 725760, while the sum is 49.

The square root of 7249511866 is about 85144.0653598359. The cubic root of 7249511866 is about 1935.3948824080.

The spelling of 7249511866 in words is "seven billion, two hundred forty-nine million, five hundred eleven thousand, eight hundred sixty-six".