660155451 has 8 divisors (see below), whose sum is σ = 881570304. Its totient is φ = 439422120.

The previous prime is 660155417. The next prime is 660155477. The reversal of 660155451 is 154551066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 660155451 - 2¹³ = 660147259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660155411) 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, 168115 + ... + 171996.

It is an arithmetic number, because the mean of its divisors is an integer number (110196288).

Almost surely, 2^660155451 is an apocalyptic number.

660155451 is a deficient number, since it is larger than the sum of its proper divisors (221414853).

660155451 is a wasteful number, since it uses less digits than its factorization.

660155451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340761.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 660155451 is about 25693.4904401874. The cubic root of 660155451 is about 870.7271196990.

The spelling of 660155451 in words is "six hundred sixty million, one hundred fifty-five thousand, four hundred fifty-one".