72401766 has 16 divisors (see below), whose sum is σ = 148171584. Its totient is φ = 23572584.

The previous prime is 72401743. The next prime is 72401773. The reversal of 72401766 is 66710427.

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, 140056 + ... + 140571.

It is an arithmetic number, because the mean of its divisors is an integer number (9260724).

Almost surely, 2^72401766 is an apocalyptic number.

72401766 is an abundant number, since it is smaller than the sum of its proper divisors (75769818).

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

72401766 is a wasteful number, since it uses less digits than its factorization.

72401766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280675.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 72401766 is about 8508.9227285245. The cubic root of 72401766 is about 416.7891324993.

The spelling of 72401766 in words is "seventy-two million, four hundred one thousand, seven hundred sixty-six".