72667990690 has 16 divisors (see below), whose sum is σ = 130875043320. Its totient is φ = 29051049600.

The previous prime is 72667990673. The next prime is 72667990693. The reversal of 72667990690 is 9609976627.

It can be written as a sum of positive squares in 4 ways, for example, as 32634783801 + 40033206889 = 180651^2 + 200083^2 .

It is a super-2 number, since 2×72667990690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72667990693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1999425 + ... + 2035444.

Almost surely, 2^72667990690 is an apocalyptic number.

72667990690 is a deficient number, since it is larger than the sum of its proper divisors (58207052630).

72667990690 is a wasteful number, since it uses less digits than its factorization.

72667990690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036677.

The product of its (nonzero) digits is 15431472, while the sum is 61.

The spelling of 72667990690 in words is "seventy-two billion, six hundred sixty-seven million, nine hundred ninety thousand, six hundred ninety".