1664362061 has 8 divisors (see below), whose sum is σ = 1673280000. Its totient is φ = 1655457552.

The previous prime is 1664362043. The next prime is 1664362079. The reversal of 1664362061 is 1602634661.

It is an interprime number because it is at equal distance from previous prime (1664362043) and next prime (1664362079).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1664362061 - 2²² = 1660167757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664362001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330440 + ... + 335438.

It is an arithmetic number, because the mean of its divisors is an integer number (209160000).

Almost surely, 2^1664362061 is an apocalyptic number.

It is an amenable number.

1664362061 is a deficient number, since it is larger than the sum of its proper divisors (8917939).

1664362061 is a wasteful number, since it uses less digits than its factorization.

1664362061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 1664362061 is about 40796.5937426153. The cubic root of 1664362061 is about 1185.0843669867.

The spelling of 1664362061 in words is "one billion, six hundred sixty-four million, three hundred sixty-two thousand, sixty-one".