666061552 has 40 divisors (see below), whose sum is σ = 1392942096. Its totient is φ = 306710016.

The previous prime is 666061541. The next prime is 666061553. The reversal of 666061552 is 255160666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666061553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93708 + ... + 100564.

Almost surely, 2^666061552 is an apocalyptic number.

It is an amenable number.

666061552 is an abundant number, since it is smaller than the sum of its proper divisors (726880544).

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

666061552 is a wasteful number, since it uses less digits than its factorization.

666061552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7345 (or 7339 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 666061552 is about 25808.1683193519. The cubic root of 666061552 is about 873.3160765517.

The spelling of 666061552 in words is "six hundred sixty-six million, sixty-one thousand, five hundred fifty-two".