1662066251 has 8 divisors (see below), whose sum is σ = 1760441040. Its totient is φ = 1563758848.

The previous prime is 1662066239. The next prime is 1662066317. The reversal of 1662066251 is 1526602661.

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 1662066251 - 2¹⁰ = 1662065227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662060251) 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, 39320 + ... + 69786.

It is an arithmetic number, because the mean of its divisors is an integer number (220055130).

Almost surely, 2^1662066251 is an apocalyptic number.

1662066251 is a deficient number, since it is larger than the sum of its proper divisors (98374789).

1662066251 is a wasteful number, since it uses less digits than its factorization.

1662066251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33693.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1662066251 is about 40768.4467572656. The cubic root of 1662066251 is about 1184.5392170763.

The spelling of 1662066251 in words is "one billion, six hundred sixty-two million, sixty-six thousand, two hundred fifty-one".