1400586661 has 2 divisors, whose sum is σ = 1400586662. Its totient is φ = 1400586660.

The previous prime is 1400586659. The next prime is 1400586673. The reversal of 1400586661 is 1666850041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1390544100 + 10042561 = 37290^2 + 3169^2 .

It is an emirp because it is prime and its reverse (1666850041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1400586661 - 2¹ = 1400586659 is a prime.

It is a super-2 number, since 2×1400586661² = 3923285989942257842, which contains 22 as substring.

Together with 1400586659, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1400586661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400586601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700293330 + 700293331.

It is an arithmetic number, because the mean of its divisors is an integer number (700293331).

Almost surely, 2^1400586661 is an apocalyptic number.

It is an amenable number.

1400586661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400586661 is an equidigital number, since it uses as much as digits as its factorization.

1400586661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1400586661 is about 37424.4126340014. The cubic root of 1400586661 is about 1118.8451800631.

The spelling of 1400586661 in words is "one billion, four hundred million, five hundred eighty-six thousand, six hundred sixty-one".