7487997866 has 8 divisors (see below), whose sum is σ = 11232391044. Its totient is φ = 3743867520.

The previous prime is 7487997833. The next prime is 7487997883. The reversal of 7487997866 is 6687997847.

It can be written as a sum of positive squares in 2 ways, for example, as 7373828641 + 114169225 = 85871^2 + 10685^2 .

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

It is a super-2 number, since 2×7487997866² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7487997866.

It is an unprimeable number.

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, 38696 + ... + 128348.

Almost surely, 2^7487997866 is an apocalyptic number.

7487997866 is a deficient number, since it is larger than the sum of its proper divisors (3744393178).

7487997866 is a wasteful number, since it uses less digits than its factorization.

7487997866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131416.

The product of its digits is 256048128, while the sum is 71.

The square root of 7487997866 is about 86533.2182806118. The cubic root of 7487997866 is about 1956.3891127535.

The spelling of 7487997866 in words is "seven billion, four hundred eighty-seven million, nine hundred ninety-seven thousand, eight hundred sixty-six".