661674652 has 12 divisors (see below), whose sum is σ = 1159823896. Its totient is φ = 330296400.

The previous prime is 661674623. The next prime is 661674653. The reversal of 661674652 is 256476166.

It is a happy number.

661674652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×661674652² = 875626690198642208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 661674599 and 661674608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661674653) 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, 132474 + ... + 137377.

Almost surely, 2^661674652 is an apocalyptic number.

It is an amenable number.

661674652 is a deficient number, since it is larger than the sum of its proper divisors (498149244).

661674652 is a wasteful number, since it uses less digits than its factorization.

661674652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270468 (or 270466 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 661674652 is about 25723.0373789722. The cubic root of 661674652 is about 871.3945362835.

The spelling of 661674652 in words is "six hundred sixty-one million, six hundred seventy-four thousand, six hundred fifty-two".