1660425590 has 8 divisors (see below), whose sum is σ = 2988766080. Its totient is φ = 664170232.

The previous prime is 1660425589. The next prime is 1660425593. The reversal of 1660425590 is 955240661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660425593) 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, 83021270 + ... + 83021289.

It is an arithmetic number, because the mean of its divisors is an integer number (373595760).

Almost surely, 2^1660425590 is an apocalyptic number.

1660425590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1660425590 is a deficient number, since it is larger than the sum of its proper divisors (1328340490).

1660425590 is a wasteful number, since it uses less digits than its factorization.

1660425590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166042566.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 1660425590 is about 40748.3200880723. The cubic root of 1660425590 is about 1184.1493274611.

The spelling of 1660425590 in words is "one billion, six hundred sixty million, four hundred twenty-five thousand, five hundred ninety".