72077660 has 12 divisors (see below), whose sum is σ = 151363128. Its totient is φ = 28831056.

The previous prime is 72077633. The next prime is 72077669. The reversal of 72077660 is 6677027.

It is a self number, because there is not a number n which added to its sum of digits gives 72077660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72077669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1801922 + ... + 1801961.

It is an arithmetic number, because the mean of its divisors is an integer number (12613594).

Almost surely, 2^72077660 is an apocalyptic number.

It is an amenable number.

72077660 is an abundant number, since it is smaller than the sum of its proper divisors (79285468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72077660 is a wasteful number, since it uses less digits than its factorization.

72077660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603892 (or 3603890 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 72077660 is about 8489.8563003151. The cubic root of 72077660 is about 416.1662843003.

The spelling of 72077660 in words is "seventy-two million, seventy-seven thousand, six hundred sixty".