75765001666 has 16 divisors (see below), whose sum is σ = 115433850240. Its totient is φ = 37289949840.

The previous prime is 75765001603. The next prime is 75765001679. The reversal of 75765001666 is 66610056757.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672061 + ... + 776656.

It is an arithmetic number, because the mean of its divisors is an integer number (7214615640).

Almost surely, 2^75765001666 is an apocalyptic number.

75765001666 is a deficient number, since it is larger than the sum of its proper divisors (39668848574).

75765001666 is a wasteful number, since it uses less digits than its factorization.

75765001666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449129.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 75765001666 in words is "seventy-five billion, seven hundred sixty-five million, one thousand, six hundred sixty-six".