1662315551 has 8 divisors (see below), whose sum is σ = 1812847680. Its totient is φ = 1515020832.

The previous prime is 1662315497. The next prime is 1662315563. The reversal of 1662315551 is 1555132661.

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

It is not a de Polignac number, because 1662315551 - 2¹⁰ = 1662314527 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 (1662315581) 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, 808280 + ... + 810333.

It is an arithmetic number, because the mean of its divisors is an integer number (226605960).

Almost surely, 2^1662315551 is an apocalyptic number.

1662315551 is a deficient number, since it is larger than the sum of its proper divisors (150532129).

1662315551 is a wasteful number, since it uses less digits than its factorization.

1662315551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618705.

The product of its digits is 27000, while the sum is 35.

The square root of 1662315551 is about 40771.5041542497. The cubic root of 1662315551 is about 1184.5984387155.

The spelling of 1662315551 in words is "one billion, six hundred sixty-two million, three hundred fifteen thousand, five hundred fifty-one".