1667216351 has 16 divisors (see below), whose sum is σ = 1831615200. Its totient is φ = 1511451648.

The previous prime is 1667216347. The next prime is 1667216357. The reversal of 1667216351 is 1536127661.

It is a cyclic number.

It is not a de Polignac number, because 1667216351 - 2² = 1667216347 is a prime.

It is a super-2 number, since 2×1667216351² = 5559220722083510402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667216357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48875 + ... + 75651.

It is an arithmetic number, because the mean of its divisors is an integer number (114475950).

Almost surely, 2^1667216351 is an apocalyptic number.

1667216351 is a deficient number, since it is larger than the sum of its proper divisors (164398849).

1667216351 is a wasteful number, since it uses less digits than its factorization.

1667216351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26938.

The product of its digits is 45360, while the sum is 38.

The square root of 1667216351 is about 40831.5607220689. The cubic root of 1667216351 is about 1185.7614317380.

The spelling of 1667216351 in words is "one billion, six hundred sixty-seven million, two hundred sixteen thousand, three hundred fifty-one".