60661560 has 32 divisors (see below), whose sum is σ = 181985040. Its totient is φ = 16176384.

The previous prime is 60661553. The next prime is 60661567. The reversal of 60661560 is 6516606.

It is an interprime number because it is at equal distance from previous prime (60661553) and next prime (60661567).

It is a super-4 number, since 4×60661560⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60661567) 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, 252637 + ... + 252876.

Almost surely, 2^60661560 is an apocalyptic number.

60661560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

60661560 is an abundant number, since it is smaller than the sum of its proper divisors (121323480).

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

60661560 is a wasteful number, since it uses less digits than its factorization.

60661560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505527 (or 505523 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 60661560 is about 7788.5531390625. The cubic root of 60661560 is about 392.9203523951.

It can be divided in two parts, 6066 and 1560, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 60661560 in words is "sixty million, six hundred sixty-one thousand, five hundred sixty".