60515661 has 4 divisors (see below), whose sum is σ = 80687552. Its totient is φ = 40343772.

The previous prime is 60515657. The next prime is 60515671. The reversal of 60515661 is 16651506.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 60515661 - 2² = 60515657 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 (60515671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10085941 + ... + 10085946.

It is an arithmetic number, because the mean of its divisors is an integer number (20171888).

Almost surely, 2^60515661 is an apocalyptic number.

It is an amenable number.

60515661 is a deficient number, since it is larger than the sum of its proper divisors (20171891).

60515661 is a wasteful number, since it uses less digits than its factorization.

60515661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20171890.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 60515661 is about 7779.1812551193. The cubic root of 60515661 is about 392.6050912017.

The spelling of 60515661 in words is "sixty million, five hundred fifteen thousand, six hundred sixty-one".