15934199666 has 16 divisors (see below), whose sum is σ = 29799023040. Its totient is φ = 6208129680.

The previous prime is 15934199663. The next prime is 15934199707. The reversal of 15934199666 is 66699143951.

It is not an unprimeable number, because it can be changed into a prime (15934199663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51734261 + ... + 51734568.

It is an arithmetic number, because the mean of its divisors is an integer number (1862438940).

Almost surely, 2^15934199666 is an apocalyptic number.

15934199666 is a deficient number, since it is larger than the sum of its proper divisors (13864823374).

15934199666 is a wasteful number, since it uses less digits than its factorization.

15934199666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103468849.

The product of its digits is 9447840, while the sum is 59.

The spelling of 15934199666 in words is "fifteen billion, nine hundred thirty-four million, one hundred ninety-nine thousand, six hundred sixty-six".