1662501461 has 2 divisors, whose sum is σ = 1662501462. Its totient is φ = 1662501460.

The previous prime is 1662501457. The next prime is 1662501499. The reversal of 1662501461 is 1641052661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1176078436 + 486423025 = 34294^2 + 22055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662501461 - 2² = 1662501457 is a prime.

It is a super-2 number, since 2×1662501461² = 5527822215654269042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662501431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831250730 + 831250731.

It is an arithmetic number, because the mean of its divisors is an integer number (831250731).

Almost surely, 2^1662501461 is an apocalyptic number.

It is an amenable number.

1662501461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662501461 is an equidigital number, since it uses as much as digits as its factorization.

1662501461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1662501461 is about 40773.7839916778. The cubic root of 1662501461 is about 1184.6425980983.

The spelling of 1662501461 in words is "one billion, six hundred sixty-two million, five hundred one thousand, four hundred sixty-one".