1501140661 has 8 divisors (see below), whose sum is σ = 1550309760. Its totient is φ = 1452689568.

The previous prime is 1501140649. The next prime is 1501140673. The reversal of 1501140661 is 1660411051.

It is an interprime number because it is at equal distance from previous prime (1501140649) and next prime (1501140673).

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 1501140661 - 2⁵ = 1501140629 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 (1501140611) 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, 175251 + ... + 183616.

It is an arithmetic number, because the mean of its divisors is an integer number (193788720).

Almost surely, 2^1501140661 is an apocalyptic number.

It is an amenable number.

1501140661 is a deficient number, since it is larger than the sum of its proper divisors (49169099).

1501140661 is an equidigital number, since it uses as much as digits as its factorization.

1501140661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359003.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1501140661 is about 38744.5565337894. The cubic root of 1501140661 is about 1145.0043314545.

The spelling of 1501140661 in words is "one billion, five hundred one million, one hundred forty thousand, six hundred sixty-one".