1661215062 has 32 divisors (see below), whose sum is σ = 3701386080. Its totient is φ = 493516800.

The previous prime is 1661215021. The next prime is 1661215067. The reversal of 1661215062 is 2605121661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661215067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364939 + ... + 369462.

It is an arithmetic number, because the mean of its divisors is an integer number (115668315).

Almost surely, 2^1661215062 is an apocalyptic number.

1661215062 is an abundant number, since it is smaller than the sum of its proper divisors (2040171018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661215062 is a wasteful number, since it uses less digits than its factorization.

1661215062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734448.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1661215062 is about 40758.0061092296. The cubic root of 1661215062 is about 1184.3369710427.

The spelling of 1661215062 in words is "one billion, six hundred sixty-one million, two hundred fifteen thousand, sixty-two".