16642665074 has 24 divisors (see below), whose sum is σ = 29058982128. Its totient is φ = 7127847720.

The previous prime is 16642665073. The next prime is 16642665107. The reversal of 16642665074 is 47056624661.

It is not an unprimeable number, because it can be changed into a prime (16642665073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94577 + ... + 205499.

It is an arithmetic number, because the mean of its divisors is an integer number (1210790922).

Almost surely, 2^16642665074 is an apocalyptic number.

16642665074 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16642665074 is a deficient number, since it is larger than the sum of its proper divisors (12416317054).

16642665074 is a wasteful number, since it uses less digits than its factorization.

16642665074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112470 (or 112463 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 16642665074 in words is "sixteen billion, six hundred forty-two million, six hundred sixty-five thousand, seventy-four".