661674762 has 48 divisors (see below), whose sum is σ = 1642160832. Its totient is φ = 188619840.

The previous prime is 661674749. The next prime is 661674763. The reversal of 661674762 is 267476166.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (661674763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51837 + ... + 63327.

It is an arithmetic number, because the mean of its divisors is an integer number (34211684).

Almost surely, 2^661674762 is an apocalyptic number.

661674762 is an abundant number, since it is smaller than the sum of its proper divisors (980486070).

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

661674762 is a wasteful number, since it uses less digits than its factorization.

661674762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11963 (or 11960 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 661674762 is about 25723.0395171333. The cubic root of 661674762 is about 871.3945845718.

The spelling of 661674762 in words is "six hundred sixty-one million, six hundred seventy-four thousand, seven hundred sixty-two".