7385666491 has 16 divisors (see below), whose sum is σ = 8906284800. Its totient is φ = 5983024608.

The previous prime is 7385666489. The next prime is 7385666531. The reversal of 7385666491 is 1946665837.

It is not a de Polignac number, because 7385666491 - 2¹ = 7385666489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7385666411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10540 + ... + 121993.

It is an arithmetic number, because the mean of its divisors is an integer number (556642800).

Almost surely, 2^7385666491 is an apocalyptic number.

7385666491 is a deficient number, since it is larger than the sum of its proper divisors (1520618309).

7385666491 is a wasteful number, since it uses less digits than its factorization.

7385666491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132978.

The product of its digits is 6531840, while the sum is 55.

The square root of 7385666491 is about 85939.9004595653. The cubic root of 7385666491 is about 1947.4361651849.

The spelling of 7385666491 in words is "seven billion, three hundred eighty-five million, six hundred sixty-six thousand, four hundred ninety-one".