67720532 has 12 divisors (see below), whose sum is σ = 129284736. Its totient is φ = 30782040.

The previous prime is 67720531. The next prime is 67720547. The reversal of 67720532 is 23502776.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67720531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769508 + ... + 769595.

It is an arithmetic number, because the mean of its divisors is an integer number (10773728).

Almost surely, 2^67720532 is an apocalyptic number.

It is an amenable number.

67720532 is a deficient number, since it is larger than the sum of its proper divisors (61564204).

67720532 is a wasteful number, since it uses less digits than its factorization.

67720532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539118 (or 1539116 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 67720532 is about 8229.2485683688. The cubic root of 67720532 is about 407.6055796786.

The spelling of 67720532 in words is "sixty-seven million, seven hundred twenty thousand, five hundred thirty-two".