1663614061 has 2 divisors, whose sum is σ = 1663614062. Its totient is φ = 1663614060.

The previous prime is 1663614047. The next prime is 1663614107. The reversal of 1663614061 is 1604163661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1632644836 + 30969225 = 40406^2 + 5565^2 .

It is an emirp because it is prime and its reverse (1604163661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1663614061 - 2²⁷ = 1529396333 is a prime.

It is a super-2 number, since 2×1663614061² = 5535223487913823442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663614041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831807030 + 831807031.

It is an arithmetic number, because the mean of its divisors is an integer number (831807031).

Almost surely, 2^1663614061 is an apocalyptic number.

It is an amenable number.

1663614061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663614061 is an equidigital number, since it uses as much as digits as its factorization.

1663614061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1663614061 is about 40787.4252803484. The cubic root of 1663614061 is about 1184.9068062752.

The spelling of 1663614061 in words is "one billion, six hundred sixty-three million, six hundred fourteen thousand, sixty-one".