10503391666 has 16 divisors (see below), whose sum is σ = 16265829888. Its totient is φ = 5081500800.

The previous prime is 10503391649. The next prime is 10503391699. The reversal of 10503391666 is 66619330501.

It is a super-2 number, since 2×10503391666² (a number of 21 digits) contains 22 as substring.

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, 716971 + ... + 731473.

It is an arithmetic number, because the mean of its divisors is an integer number (1016614368).

Almost surely, 2^10503391666 is an apocalyptic number.

10503391666 is a deficient number, since it is larger than the sum of its proper divisors (5762438222).

10503391666 is a wasteful number, since it uses less digits than its factorization.

10503391666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26217.

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 10503391666 in words is "ten billion, five hundred three million, three hundred ninety-one thousand, six hundred sixty-six".