157551660 has 108 divisors (see below), whose sum is σ = 555963408. Its totient is φ = 36009792.

The previous prime is 157551649. The next prime is 157551673. The reversal of 157551660 is 66155751.

157551660 is a `hidden beast` number, since 15 + 75 + 516 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 112 + ... + 17751.

Almost surely, 2^157551660 is an apocalyptic number.

157551660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157551660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277981704).

157551660 is an abundant number, since it is smaller than the sum of its proper divisors (398411748).

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

157551660 is a wasteful number, since it uses less digits than its factorization.

157551660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17892 (or 17880 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 157551660 is about 12551.9584129330. The cubic root of 157551660 is about 540.1001871723.

It can be divided in two parts, 1575 and 51660, that added together give a palindrome (53235).

The spelling of 157551660 in words is "one hundred fifty-seven million, five hundred fifty-one thousand, six hundred sixty".