166687560 has 96 divisors (see below), whose sum is σ = 583422840. Its totient is φ = 41029632.

The previous prime is 166687537. The next prime is 166687561. The reversal of 166687560 is 65786661.

It can be written as a sum of positive squares in 4 ways, for example, as 92968164 + 73719396 = 9642^2 + 8586^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (166687561) 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, 13129 + ... + 22488.

Almost surely, 2^166687560 is an apocalyptic number.

166687560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166687560 is an abundant number, since it is smaller than the sum of its proper divisors (416735280).

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

166687560 is a wasteful number, since it uses less digits than its factorization.

166687560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35647 (or 35640 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 166687560 is about 12910.7536573199. The cubic root of 166687560 is about 550.3442032771.

The spelling of 166687560 in words is "one hundred sixty-six million, six hundred eighty-seven thousand, five hundred sixty".