72194566 has 16 divisors (see below), whose sum is σ = 114726960. Its totient is φ = 33976800.

The previous prime is 72194519. The next prime is 72194581. The reversal of 72194566 is 66549127.

72194566 = T₁₅₆₃ + T₁₅₆₄ + ... + T₁₆₁₉.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 85 + ... + 12016.

It is an arithmetic number, because the mean of its divisors is an integer number (7170435).

Almost surely, 2^72194566 is an apocalyptic number.

72194566 is a deficient number, since it is larger than the sum of its proper divisors (42532394).

72194566 is a wasteful number, since it uses less digits than its factorization.

72194566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12279.

The product of its digits is 90720, while the sum is 40.

The square root of 72194566 is about 8496.7385507617. The cubic root of 72194566 is about 416.3911623716.

The spelling of 72194566 in words is "seventy-two million, one hundred ninety-four thousand, five hundred sixty-six".