72165674 has 32 divisors (see below), whose sum is σ = 129724416. Its totient is φ = 29438640.

The previous prime is 72165671. The next prime is 72165679. The reversal of 72165674 is 47656127.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (72165671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86849 + ... + 87675.

It is an arithmetic number, because the mean of its divisors is an integer number (4053888).

Almost surely, 2^72165674 is an apocalyptic number.

72165674 is a deficient number, since it is larger than the sum of its proper divisors (57558742).

72165674 is a wasteful number, since it uses less digits than its factorization.

72165674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130.

The product of its digits is 70560, while the sum is 38.

The square root of 72165674 is about 8495.0381988547. The cubic root of 72165674 is about 416.3356088892.

The spelling of 72165674 in words is "seventy-two million, one hundred sixty-five thousand, six hundred seventy-four".