1662130997 has 8 divisors (see below), whose sum is σ = 1673952000. Its totient is φ = 1650351024.

The previous prime is 1662130931. The next prime is 1662131033. The reversal of 1662130997 is 7990312661.

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

It is a cyclic number.

It is not a de Polignac number, because 1662130997 - 2²⁰ = 1661082421 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 (1662330997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73448 + ... + 93374.

It is an arithmetic number, because the mean of its divisors is an integer number (209244000).

Almost surely, 2^1662130997 is an apocalyptic number.

It is an amenable number.

1662130997 is a deficient number, since it is larger than the sum of its proper divisors (11821003).

1662130997 is a wasteful number, since it uses less digits than its factorization.

1662130997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20515.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 1662130997 is about 40769.2408195198. The cubic root of 1662130997 is about 1184.5545981680.

The spelling of 1662130997 in words is "one billion, six hundred sixty-two million, one hundred thirty thousand, nine hundred ninety-seven".