67320045 has 64 divisors (see below), whose sum is σ = 130636800. Its totient is φ = 32693760.

The previous prime is 67320031. The next prime is 67320047. The reversal of 67320045 is 54002376.

It is a happy number.

It is not a de Polignac number, because 67320045 - 2⁸ = 67319789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67320047) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 155980 + ... + 156410.

It is an arithmetic number, because the mean of its divisors is an integer number (2041200).

Almost surely, 2^67320045 is an apocalyptic number.

67320045 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

67320045 is a deficient number, since it is larger than the sum of its proper divisors (63316755).

67320045 is a wasteful number, since it uses less digits than its factorization.

67320045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 67320045 is about 8204.8793409775. The cubic root of 67320045 is about 406.8004885959.

The spelling of 67320045 in words is "sixty-seven million, three hundred twenty thousand, forty-five".