67320057 has 32 divisors (see below), whose sum is σ = 109965312. Its totient is φ = 35792064.

The previous prime is 67320053. The next prime is 67320061. The reversal of 67320057 is 75002376.

It is an interprime number because it is at equal distance from previous prime (67320053) and next prime (67320061).

It is not a de Polignac number, because 67320057 - 2² = 67320053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67320053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15988 + ... + 19754.

It is an arithmetic number, because the mean of its divisors is an integer number (3436416).

Almost surely, 2^67320057 is an apocalyptic number.

It is an amenable number.

67320057 is a deficient number, since it is larger than the sum of its proper divisors (42645255).

67320057 is a wasteful number, since it uses less digits than its factorization.

67320057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 67320057 is about 8204.8800722497. The cubic root of 67320057 is about 406.8005127671.

The spelling of 67320057 in words is "sixty-seven million, three hundred twenty thousand, fifty-seven".