157080661 has 4 divisors (see below), whose sum is σ = 157113324. Its totient is φ = 157048000.

The previous prime is 157080653. The next prime is 157080683. The reversal of 157080661 is 166080751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166080751 = 47 ⋅3533633.

It can be written as a sum of positive squares in 2 ways, for example, as 60746436 + 96334225 = 7794^2 + 9815^2 .

It is a cyclic number.

It is not a de Polignac number, because 157080661 - 2³ = 157080653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157080631) 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, 7540 + ... + 19261.

It is an arithmetic number, because the mean of its divisors is an integer number (39278331).

Almost surely, 2^157080661 is an apocalyptic number.

It is an amenable number.

157080661 is a deficient number, since it is larger than the sum of its proper divisors (32663).

157080661 is an equidigital number, since it uses as much as digits as its factorization.

157080661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32662.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 157080661 is about 12533.1823971408. The cubic root of 157080661 is about 539.5614420493.

The spelling of 157080661 in words is "one hundred fifty-seven million, eighty thousand, six hundred sixty-one".