1660625522 has 4 divisors (see below), whose sum is σ = 2490938286. Its totient is φ = 830312760.

The previous prime is 1660625503. The next prime is 1660625531. The reversal of 1660625522 is 2255260661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1620948121 + 39677401 = 40261^2 + 6299^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415156379 + ... + 415156382.

Almost surely, 2^1660625522 is an apocalyptic number.

1660625522 is a deficient number, since it is larger than the sum of its proper divisors (830312764).

1660625522 is an equidigital number, since it uses as much as digits as its factorization.

1660625522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830312763.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1660625522 is about 40750.7732687369. The cubic root of 1660625522 is about 1184.1968533972.

The spelling of 1660625522 in words is "one billion, six hundred sixty million, six hundred twenty-five thousand, five hundred twenty-two".