16506746 has 4 divisors (see below), whose sum is σ = 24760122. Its totient is φ = 8253372.

The previous prime is 16506739. The next prime is 16506751. The reversal of 16506746 is 64760561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64760561 = 941 ⋅68821.

It can be written as a sum of positive squares in only one way, i.e., 13579225 + 2927521 = 3685^2 + 1711^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4126685 + ... + 4126688.

Almost surely, 2^16506746 is an apocalyptic number.

16506746 is a deficient number, since it is larger than the sum of its proper divisors (8253376).

16506746 is an equidigital number, since it uses as much as digits as its factorization.

16506746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8253375.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 16506746 is about 4062.8494926591. The cubic root of 16506746 is about 254.6168589336.

The spelling of 16506746 in words is "sixteen million, five hundred six thousand, seven hundred forty-six".