16072661 has 4 divisors (see below), whose sum is σ = 17533824. Its totient is φ = 14611500.

The previous prime is 16072649. The next prime is 16072673. The reversal of 16072661 is 16627061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (16072649) and next prime (16072673).

It is a cyclic number.

It is not a de Polignac number, because 16072661 - 2⁶ = 16072597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16072631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730565 + ... + 730586.

It is an arithmetic number, because the mean of its divisors is an integer number (4383456).

Almost surely, 2^16072661 is an apocalyptic number.

16072661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16072661 is a deficient number, since it is larger than the sum of its proper divisors (1461163).

16072661 is a wasteful number, since it uses less digits than its factorization.

16072661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461162.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 16072661 is about 4009.0723365886. The cubic root of 16072661 is about 252.3650803566.

The spelling of 16072661 in words is "sixteen million, seventy-two thousand, six hundred sixty-one".