157566340 has 12 divisors (see below), whose sum is σ = 330889356. Its totient is φ = 63026528.

The previous prime is 157566329. The next prime is 157566341. The reversal of 157566340 is 43665751.

It can be written as a sum of positive squares in 2 ways, for example, as 37970244 + 119596096 = 6162^2 + 10936^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 157566340.

It is not an unprimeable number, because it can be changed into a prime (157566341) 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, 3939139 + ... + 3939178.

It is an arithmetic number, because the mean of its divisors is an integer number (27574113).

Almost surely, 2^157566340 is an apocalyptic number.

157566340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157566340 is an abundant number, since it is smaller than the sum of its proper divisors (173323016).

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

157566340 is a wasteful number, since it uses less digits than its factorization.

157566340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7878326 (or 7878324 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 157566340 is about 12552.5431686173. The cubic root of 157566340 is about 540.1169614047.

The spelling of 157566340 in words is "one hundred fifty-seven million, five hundred sixty-six thousand, three hundred forty".