74906408660 has 12 divisors (see below), whose sum is σ = 157303458228. Its totient is φ = 29962563456.

The previous prime is 74906408641. The next prime is 74906408663. The reversal of 74906408660 is 6680460947.

It can be written as a sum of positive squares in 2 ways, for example, as 43872653764 + 31033754896 = 209458^2 + 176164^2 .

It is a super-2 number, since 2×74906408660² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74906408599 and 74906408608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74906408663) 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, 1872660197 + ... + 1872660236.

It is an arithmetic number, because the mean of its divisors is an integer number (13108621519).

Almost surely, 2^74906408660 is an apocalyptic number.

It is an amenable number.

74906408660 is an abundant number, since it is smaller than the sum of its proper divisors (82397049568).

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

74906408660 is a wasteful number, since it uses less digits than its factorization.

74906408660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745320442 (or 3745320440 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 74906408660 in words is "seventy-four billion, nine hundred six million, four hundred eight thousand, six hundred sixty".